Podcasts about ligo virgo

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Best podcasts about ligo virgo

Latest podcast episodes about ligo virgo

Disciplinas Alternativas
DIS-001-XXII-147-Ligo Virgo y Kagra.

Disciplinas Alternativas

Play Episode Listen Later Sep 10, 2024 5:26


Las ONDAS GRAVITACIONALES Ligo – Virgo y Kagra LIGO, Virgo y KAGRA, se están coordinando para comenzar la carrera de observación, denominada como: “O4” en forma conjunta. Planean comenzar la carrera de observación O4 a mediados de diciembre de 2022, aunque todavía están trabajando para superar los retrasos causados por la pandemia del Covid-19. También se encuentran planeando un seminario web para fines de abril para actualizar a la comunidad sobre el estado del trabajo en los detectores. Y para discutir los desafíos restantes en su programa actual, que anticipa los siguientes avances: LIGO Proyecta un objetivo de sensibilidad de 160 a 190 megaparsecs para estrellas de neutrones binarias. VIRGO Proyecta una sensibilidad objetivo de 80 a 115 megaparsecs. KAGRA Debería funcionar con una sensibilidad superior a 1 megaparsec al comienzo de O4 y trabajará para mejorar la sensibilidad hacia el final de la carrera O4.. Opinemos de la noticia …

Sommerfeld Theory Colloquium (ASC)
Advances and Challenges in Solving the Two-Body Problem in General Relativity

Sommerfeld Theory Colloquium (ASC)

Play Episode Listen Later Apr 24, 2024 82:53


Since the discovery of the first binary black-hole merger in 2015, analytical and numerical solutions to the relativistic two-body problem have been essential for the detection and interpretation of more than 100 gravitational-wave signals from compact-object binaries. Future experiments will detect black holes at cosmic dawn, probe the nature of gravity and reveal the composition of neutron stars with exquisite precision. Theoretical advances (of up to two orders of magnitude in the precision with which we can predict relativistic dynamics) are needed to turn gravitational-wave astronomy into precision laboratories of astrophysics, cosmology, and gravity. In this talk, I will discuss recent advances in modeling the two-body dynamics and gravitational radiation, review the science that accurate waveform models have enabled with LIGO-Virgo gravitational-wave observations, and highlight the theoretical challenges that lie ahead to fully exploit the discovery potential of increasingly sensitive detectors on the ground, such as the Einstein Telescope and Cosmic Explorer, and in space, such as the Laser Interferometer Space Antenna (LISA).

Coffee Break: Señal y Ruido
Ep458_B: Proxima b; LIGO+VIRGO; Sag A*; Neutrinos; Lentes Oscuras

Coffee Break: Señal y Ruido

Play Episode Listen Later Apr 4, 2024 129:40


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy:Cara B:-La nueva imagen de Sgr A* con la polarización de la luz (09:26)-IceCube pone cotas a efectos de decoherencia en neutrinos atmosféricos, que se toman como cotas al acoplamiento con la gravedad (57:26)-Buscando lentes oscuras en datos de GAIA (1:32:26)-Señales de los oyentes (1:53:36)Este episodio es continuación de la Cara A.Contertulios: Isabel Cordero, Gastón Giribet, Sara Robisco, Iván Martí, Francis Villatoro, Héctor Socas. Imagen de portada realizada con Midjourney. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. Hosted on Acast. See acast.com/privacy for more information.

Coffee Break: Señal y Ruido
Ep458_A: Proxima b; LIGO+VIRGO; Sag A*; Neutrinos; Lentes Oscuras

Coffee Break: Señal y Ruido

Play Episode Listen Later Apr 4, 2024 56:03


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy:Cara A:-Breve aclaración sobre enanas negras (ep286, p332) (5:00)-El entorno de radiación en Proxima b: Rayos cósmicos y partículas energéticas estelares (14:30)-El anuncio de que LIGO+VIRGO reanudan observaciones (run 4, O4b) (43:30)Este episodio continúa en la Cara B.Contertulios: Sara Robisco, Isabel Cordero, Francis Villatoro, Héctor Socas. Imagen de portada realizada con Midjourney. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. Hosted on Acast. See acast.com/privacy for more information.

Learning Bayesian Statistics
#101 Black Holes Collisions & Gravitational Waves, with LIGO Experts Christopher Berry & John Veitch

Learning Bayesian Statistics

Play Episode Listen Later Mar 7, 2024 69:54 Transcription Available


Proudly sponsored by PyMC Labs, the Bayesian Consultancy. Book a call, or get in touch!My Intuitive Bayes Online Courses1:1 Mentorship with meIn this episode, we dive deep into gravitational wave astronomy, with Christopher Berry and John Veitch, two senior lecturers at the University of Glasgow and experts from the LIGO-VIRGO collaboration. They explain the significance of detecting gravitational waves, which are essential for understanding black holes and neutron stars collisions. This research not only sheds light on these distant events but also helps us grasp the fundamental workings of the universe.Our discussion focuses on the integral role of Bayesian statistics, detailing how they use nested sampling for extracting crucial information from the subtle signals of gravitational waves. This approach is vital for parameter estimation and understanding the distribution of cosmic sources through population inferences.Concluding the episode, Christopher and John highlight the latest advancements in black hole astrophysics and tests of general relativity, and touch upon the exciting prospects and challenges of the upcoming space-based LISA mission.Our theme music is « Good Bayesian », by Baba Brinkman (feat MC Lars and Mega Ran). Check out his awesome work at https://bababrinkman.com/ !Thank you to my Patrons for making this episode possible!Yusuke Saito, Avi Bryant, Ero Carrera, Giuliano Cruz, Tim Gasser, James Wade, Tradd Salvo, William Benton, James Ahloy, Robin Taylor,, Chad Scherrer, Zwelithini Tunyiswa, Bertrand Wilden, James Thompson, Stephen Oates, Gian Luca Di Tanna, Jack Wells, Matthew Maldonado, Ian Costley, Ally Salim, Larry Gill, Ian Moran, Paul Oreto, Colin Caprani, Colin Carroll, Nathaniel Burbank, Michael Osthege, Rémi Louf, Clive Edelsten, Henri Wallen, Hugo Botha, Vinh Nguyen, Marcin Elantkowski, Adam C. Smith, Will Kurt, Andrew Moskowitz, Hector Munoz, Marco Gorelli, Simon Kessell, Bradley Rode, Patrick Kelley, Rick Anderson, Casper de Bruin, Philippe Labonde, Michael Hankin, Cameron Smith, Tomáš Frýda, Ryan Wesslen, Andreas Netti, Riley King, Yoshiyuki Hamajima, Sven De Maeyer, Michael DeCrescenzo, Fergal M, Mason Yahr, Naoya Kanai, Steven Rowland, Aubrey Clayton, Jeannine Sue, Omri Har Shemesh, Scott Anthony Robson, Robert Yolken, Or Duek, Pavel Dusek, Paul Cox, Andreas Kröpelin, Raphaël R, Nicolas Rode, Gabriel Stechschulte, Arkady, Kurt TeKolste, Gergely Juhasz, Marcus Nölke, Maggi Mackintosh, Grant Pezzolesi, Avram Aelony, Joshua Meehl, Javier Sabio, Kristian Higgins, Alex Jones, Gregorio Aguilar, Matt Rosinski, Bart Trudeau, Luis Fonseca, Dante Gates, Matt Niccolls, Maksim Kuznecov, Michael Thomas, Luke Gorrie, Cory Kiser and Julio.Visit https://www.patreon.com/learnbayesstats to unlock exclusive Bayesian swag ;)Takeaways: ⁃ Gravitational wave analysis involves using Bayesian statistics for parameter estimation and population...

Astro arXiv | all categories
Prospects for detecting and localizing short-duration transient gravitational waves from glitching neutron stars without electromagnetic counterparts

Astro arXiv | all categories

Play Episode Listen Later Nov 30, 2022 1:04


Prospects for detecting and localizing short-duration transient gravitational waves from glitching neutron stars without electromagnetic counterparts by Dixeena Lopez et al. on Wednesday 30 November Neutron stars are known to show accelerated spin-up of their rotational frequency called a glitch. Highly magnetized rotating neutron stars (pulsars) are frequently observed by radio telescopes (and in other frequencies), where the glitch is observed as irregular arrival times of pulses which are otherwise very regular. A glitch in an isolated neutron star can excite the fundamental (f)-mode oscillations which can lead to gravitational wave generation. Electromagnetic observations of pulsars (and hence pulsar glitches) require the pulsar to be oriented so that the jet is pointed toward the detector, but this is not a requirement for gravitational wave emission which is more isotropic and not jetlike. Hence, gravitational wave observations have the potential to uncover nearby neutron stars where the jet is not pointed towards the Earth. In this work, we study the prospects of finding glitching neutron stars using a generic all-sky search for short-duration gravitational wave transients. The analysis covers the high-frequency range from $1-4$ kHz of LIGO-Virgo detectors for signals up to a few seconds. We set upper limits for the third observing run of the LIGO-Virgo detectors and present the prospects for upcoming observing runs of LIGO, Virgo, KAGRA, and LIGO India. We find the detectable glitch size will be around $10^{-5}$ Hz for the fifth observing run for pulsars with spin frequencies and distances comparable to the Vela pulsar. We also present the prospects of localizing the direction in the sky of these sources with gravitational waves alone, which can facilitate electromagnetic follow-up. We find that for the five detector configuration, the localization capability for a glitch size of $10^{-5}$ Hz is around $132,mathrm{deg}^{2}$ at $1sigma$ confidence for $50%$ of events with distance and spin frequency as that of Vela. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2206.14515v3

Astro arXiv | all categories
The Merger Rate of Primordial Black Hole-Neutron Star Binaries in Ellipsoidal-Collapse Dark Matter Halo Models

Astro arXiv | all categories

Play Episode Listen Later Nov 28, 2022 1:05


The Merger Rate of Primordial Black Hole-Neutron Star Binaries in Ellipsoidal-Collapse Dark Matter Halo Models by Saeed Fakhry et al. on Monday 28 November Primordial black holes (PBHs), as a potential macroscopic candidate for dark matter, can encounter other compact objects in dark matter halos because of their random distribution. Besides, the detection of gravitational waves (GWs) related to the stellar-mass black hole-neutron star (BH-NS) mergers raises the possibility that the BHs involved in such events may have a primordial origin. In this work, we calculate the merger rate of PBH-NS binaries within the framework of ellipsoidal-collapse dark matter halo models and compare it with the corresponding results derived from spherical-collapse dark matter halo models. Our results exhibit that ellipsoidal-collapse dark matter halo models can potentially amplify the merger rate of PBH-NS binaries in such a way that it is very close to the range estimated by the LIGO-Virgo observations. While spherical-collapse dark matter halo models cannot justify PBH-NS merger events as consistent results with the latest GW data reported by the LIGO-Virgo collaboration. In addition, we calculate the merger rate of PBH-NS binaries as a function of PBH mass and fraction within the context of ellipsoidal-collapse dark matter halo models. The results indicate that PBH-NS merger events with the mass of $(M_{PBH}le 5 M_{odot}, M_{NS}simeq 1.4 M_{odot})$ will be consistent with the LIGO-Virgo observations if $f_{PBH}simeq 1$. We also show that to have at least on $(M_{PBH}simeq 5 M_{odot}, M_{NS}simeq 1.4 M_{odot})$ event in the comoving volume $1 Gpc^{3}$ annually, ellipsoidal-collapse dark matter halo models constrain the abundance of PBHs as $f_{PBH} geq 0.1$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.08909v2

Astro arXiv | all categories
The Merger Rate of Primordial Black Hole-Neutron Star Binaries in Ellipsoidal-Collapse Dark Matter Halo Models

Astro arXiv | all categories

Play Episode Listen Later Nov 27, 2022 1:09


The Merger Rate of Primordial Black Hole-Neutron Star Binaries in Ellipsoidal-Collapse Dark Matter Halo Models by Saeed Fakhry et al. on Sunday 27 November Primordial black holes (PBHs), as a potential macroscopic candidate for dark matter, can encounter other compact objects in dark matter halos because of their random distribution. Besides, the detection of gravitational waves (GWs) related to the stellar-mass black hole-neutron star (BH-NS) mergers raises the possibility that the BHs involved in such events may have a primordial origin. In this work, we calculate the merger rate of PBH-NS binaries within the framework of ellipsoidal-collapse dark matter halo models and compare it with the corresponding results derived from spherical-collapse dark matter halo models. Our results exhibit that ellipsoidal-collapse dark matter halo models can potentially amplify the merger rate of PBH-NS binaries in such a way that it is very close to the range estimated by the LIGO-Virgo observations. While spherical-collapse dark matter halo models cannot justify PBH-NS merger events as consistent results with the latest GW data reported by the LIGO-Virgo collaboration. In addition, we calculate the merger rate of PBH-NS binaries as a function of PBH mass and fraction within the context of ellipsoidal-collapse dark matter halo models. The results indicate that PBH-NS merger events with the mass of $(M_{PBH}le 5 M_{odot}, M_{NS}simeq 1.4 M_{odot})$ will be consistent with the LIGO-Virgo observations if $f_{PBH}simeq 1$. We also show that to have at least on $(M_{PBH}simeq 5 M_{odot}, M_{NS}simeq 1.4 M_{odot})$ event in the comoving volume $1 Gpc^{3}$ annually, ellipsoidal-collapse dark matter halo models constrain the abundance of PBHs as $f_{PBH} geq 0.1$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.08909v2

Astro arXiv | all categories
Missed opportunities: GRB 211211A and the case for continual gravitational-wave coverage with a single observatory

Astro arXiv | all categories

Play Episode Listen Later Nov 23, 2022 1:10


Missed opportunities: GRB 211211A and the case for continual gravitational-wave coverage with a single observatory by Nikhil Sarin et al. on Wednesday 23 November Gamma-ray burst GRB 211211A may have been the result of a neutron star merger at $approx350$ Mpc. However, none of the LIGO-Virgo detectors were operating at the time. We show that the gravitational-wave signal from a grb-like binary neutron star inspiral in the next LIGO-Virgo-KAGRA observing run (O4) would be below the conventional detection threshold, however a coincident gamma-ray burst observation would provide necessary information to claim a statistically-significant multimessenger observation. We calculate that with O4 sensitivity, approximately $11%$ of gamma-ray bursts within 600 Mpc will produce a confident association between the gravitational-wave binary neutron star inspiral signature and the prompt gamma-ray signature. This corresponds to a coincident detection rate of $unit[0.22^{+8.3}_{-0.22}]{yr^{-1}}$, where the uncertainties are the 90% confidence intervals arising from uncertainties in the absolute merger rate, beaming and jet-launching fractions. These increase to approximately $34%$ and $unit[0.71^{+26.8}_{-0.70}]{yr^{-1}}$ with proposed O5 sensitivity. We show that the above numbers do not depend significantly on the number of gravitational-wave observatories operating with the specific sensitivity. That is, the number of confident joint gamma-ray burst and gravitational-wave detections is only marginally improved with two or three detectors operating compared to a single detector. It is therefore worth considering whether one detector with sufficient sensitivity (post O4) should remain in sky-watch mode at all times to elucidate the true nature of GRB 211211A-like events, a proposal we discuss in detail. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.14938v2

Astro arXiv | all categories
Comparing hierarchical black hole mergers in star clusters and active galactic nuclei

Astro arXiv | all categories

Play Episode Listen Later Nov 22, 2022 0:42


Comparing hierarchical black hole mergers in star clusters and active galactic nuclei by Guo-Peng Li et al. on Tuesday 22 November Star clusters (SCs) and active galactic nuclei (AGNs) are promising sites for the occurrence of hierarchical black hole (BH) mergers. We use simple models to compare hierarchical BH mergers in two of the dynamical formation channels. We find that the primary mass distribution of hierarchical mergers in AGNs is higher than that in SCs, with the peaks of $sim$$13~M_{odot}$ and $sim$$50~M_{odot}$, respectively. The effective spin ($chi_{rm eff}$) distribution of hierarchical mergers in SCs is symmetrical around zero as expected and $sim$50% of the mergers have $|chi_{rm eff}|>0.2$. The distribution of $chi_{rm eff}$ in AGNs is narrow and prefers positive values with the peak of $chi_{rm eff}ge0.3$ due to the assistance of AGN disks. BH hierarchical growth efficiency, with at least $sim$30% of mergers being hierarchies in AGNs, is much higher than the efficiency in SCs. We argue that the majority of the hierarchical merger candidates detected by LIGO-Virgo may originate from the AGN channel. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.11150v1

Astro arXiv | all categories
Missed opportunities: GRB 211211A and the case for continual gravitational-wave coverage with a single observatory

Astro arXiv | all categories

Play Episode Listen Later Nov 22, 2022 0:56


Missed opportunities: GRB 211211A and the case for continual gravitational-wave coverage with a single observatory by Nikhil Sarin et al. on Tuesday 22 November Gamma-ray burst GRB 211211A may have been the result of a neutron star merger at $approx350$ Mpc. However, none of the LIGO-Virgo detectors were operating at the time. We show that the gravitational-wave signal from a grb-like binary neutron star inspiral in the next LIGO-Virgo-KAGRA observing run (O4) would be below the conventional detection threshold, however a coincident gamma-ray burst observation would provide necessary information to claim a statistically-significant multimessenger observation. We calculate that with O4 sensitivity, approximately $11%$ of gamma-ray bursts within 600 Mpc will produce a confident association between the gravitational-wave binary neutron star inspiral signature and the prompt gamma-ray signature. This corresponds to a coincident detection rate of $unit[0.22^{+8.3}_{-0.22}]{yr^{-1}}$, where the uncertainties are the 90% confidence intervals arising from uncertainties in the absolute merger rate, beaming and jet-launching fractions. These increase to approximately $34%$ and $unit[0.71^{+26.8}_{-0.70}]{yr^{-1}}$ with proposed O5 sensitivity. We show that the above numbers do not depend significantly on the number of gravitational-wave observatories operating with the specific sensitivity. That is, the number of confident joint gamma-ray burst and gravitational-wave detections is only marginally improved with two or three detectors operating compared to a single detector. It is therefore worth considering whether one detector with sufficient sensitivity (post O4) should remain in sky-watch mode at all times to elucidate the true nature of GRB 211211A-like events, a proposal we discuss in detail. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.14938v2

Astro arXiv | all categories
Eccentricity or spin precession? Distinguishing subdominant effects in gravitational-wave data

Astro arXiv | all categories

Play Episode Listen Later Nov 22, 2022 0:50


Eccentricity or spin precession? Distinguishing subdominant effects in gravitational-wave data by Isobel M. Romero-Shaw et al. on Tuesday 22 November Eccentricity and spin precession are key observables in gravitational-wave astronomy, encoding precious information about the astrophysical formation of compact binaries together with fine details of the relativistic two-body problem. However, the two effects can mimic each other in the emitted signals, raising issues around their distinguishability. Since inferring the existence of both eccentricity and spin precession simultaneously is -- at present -- not possible, current state-of-the-art analyses assume that either one of the effects may be present in the data. In such a setup, what are the conditions required for a confident identification of either effect? We present simulated parameter inference studies in realistic LIGO/Virgo noise, studying events consistent with either spin precessing or eccentric binary black hole coalescences and recovering under the assumption that either of the two effects may be at play. We quantify how the distinguishability of eccentricity and spin precession increases with the number of visible orbital cycles, confirming that the signal must be sufficiently long for the two effects to be separable. The threshold depends on the injected source, with inclination, eccentricity, and effective spin playing crucial roles. In particular, for injections similar to GW190521, we find that it is impossible to confidently distinguish eccentricity from spin precession. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.07528v2

Astro arXiv | all categories
Comparing hierarchical black hole mergers in star clusters and active galactic nuclei

Astro arXiv | all categories

Play Episode Listen Later Nov 21, 2022 0:46


Comparing hierarchical black hole mergers in star clusters and active galactic nuclei by Guo-Peng Li et al. on Monday 21 November Star clusters (SCs) and active galactic nuclei (AGNs) are promising sites for the occurrence of hierarchical black hole (BH) mergers. We use simple models to compare hierarchical BH mergers in two of the dynamical formation channels. We find that the primary mass distribution of hierarchical mergers in AGNs is higher than that in SCs, with the peaks of $sim$$13~M_{odot}$ and $sim$$50~M_{odot}$, respectively. The effective spin ($chi_{rm eff}$) distribution of hierarchical mergers in SCs is symmetrical around zero as expected and $sim$50% of the mergers have $|chi_{rm eff}|>0.2$. The distribution of $chi_{rm eff}$ in AGNs is narrow and prefers positive values with the peak of $chi_{rm eff}ge0.3$ due to the assistance of AGN disks. BH hierarchical growth efficiency, with at least $sim$30% of mergers being hierarchies in AGNs, is much higher than the efficiency in SCs. We argue that the majority of the hierarchical merger candidates detected by LIGO-Virgo may originate from the AGN channel. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.11150v1

Astro arXiv | all categories
Eccentricity or spin precession? Distinguishing subdominant effects in gravitational-wave data

Astro arXiv | all categories

Play Episode Listen Later Nov 21, 2022 0:50


Eccentricity or spin precession? Distinguishing subdominant effects in gravitational-wave data by Isobel M. Romero-Shaw et al. on Monday 21 November Eccentricity and spin precession are key observables in gravitational-wave astronomy, encoding precious information about the astrophysical formation of compact binaries together with fine details of the relativistic two-body problem. However, the two effects can mimic each other in the emitted signals, raising issues around their distinguishability. Since inferring the existence of both eccentricity and spin precession simultaneously is -- at present -- not possible, current state-of-the-art analyses assume that either one of the effects may be present in the data. In such a setup, what are the conditions required for a confident identification of either effect? We present simulated parameter inference studies in realistic LIGO/Virgo noise, studying events consistent with either spin precessing or eccentric binary black hole coalescences and recovering under the assumption that either of the two effects may be at play. We quantify how the distinguishability of eccentricity and spin precession increases with the number of visible orbital cycles, confirming that the signal must be sufficiently long for the two effects to be separable. The threshold depends on the injected source, with inclination, eccentricity, and effective spin playing crucial roles. In particular, for injections similar to GW190521, we find that it is impossible to confidently distinguish eccentricity from spin precession. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.07528v2

Astro arXiv | all categories
Constraints on compact dark matter from lensing of gravitational waves for the third-generation gravitational wave detector

Astro arXiv | all categories

Play Episode Listen Later Oct 11, 2022 0:56


Constraints on compact dark matter from lensing of gravitational waves for the third-generation gravitational wave detector by Huan Zhou et al. on Tuesday 11 October Since the first gravitational wave (GW) event from binary black hole (BBH) was detected by LIGO-Virgo, GWs have become a useful probe on astrophysics and cosmology. If compact dark matter (DM) objects e.g. primordial black holes, contribute a significant fraction of dark matter at wide mass range, they will cause microlensing in the GW signals with long wavelengths that are distinct from the lensing effects of electromagnetic signals from astrophysical objects. In this paper, we apply the lensing effect of GW from BBH to derive constraints on the abundance of compact DM for the Cosmic Explorer, a third-generation ground-based GW detector. We firstly consider two channels of formation of BBH that contribute to low and high redshift GW sources, including the astrophysical origin BBH scenario, and the primordial origin BBH scenario. Secondly, comparing with the method of optical depth, we use the Bayesian analysis to derive constraints on the abundance of compact DM with different mass function of lens taken into consideration. For a null search with $1000$ detected GW events of BBH, we find that the abundance of compact DM could be constrained to $lesssim0.1%$ in the mass range $geq500~M_{odot}$ at $68%$ confidence level. In addition, if a GW event lensed by a compact DM object with $M_{rm l}in[100~M_{odot},300~M_{odot}]$ is detected in $100$ detected GW events of BBH, we can derive that the estimation of the abundance of compact DM is from $2.3%$ to $25.2%$ in this mass range with the Bayesian analysis. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2206.13128v3

Astro arXiv | all categories
Constraints on compact dark matter from lensing of gravitational waves for the third-generation gravitational wave detector

Astro arXiv | all categories

Play Episode Listen Later Oct 11, 2022 1:03


Constraints on compact dark matter from lensing of gravitational waves for the third-generation gravitational wave detector by Huan Zhou et al. on Tuesday 11 October Since the first gravitational wave (GW) event from binary black hole (BBH) was detected by LIGO-Virgo, GWs have become a useful probe on astrophysics and cosmology. If compact dark matter (DM) objects e.g. primordial black holes, contribute a significant fraction of dark matter at wide mass range, they will cause microlensing in the GW signals with long wavelengths that are distinct from the lensing effects of electromagnetic signals from astrophysical objects. In this paper, we apply the lensing effect of GW from BBH to derive constraints on the abundance of compact DM for the Cosmic Explorer, a third-generation ground-based GW detector. We firstly consider two channels of formation of BBH that contribute to low and high redshift GW sources, including the astrophysical origin BBH scenario, and the primordial origin BBH scenario. Secondly, comparing with the method of optical depth, we use the Bayesian analysis to derive constraints on the abundance of compact DM with different mass function of lens taken into consideration. For a null search with $1000$ detected GW events of BBH, we find that the abundance of compact DM could be constrained to $lesssim0.1%$ in the mass range $geq500~M_{odot}$ at $68%$ confidence level. In addition, if a GW event lensed by a compact DM object with $M_{rm l}in[100~M_{odot},300~M_{odot}]$ is detected in $100$ detected GW events of BBH, we can derive that the estimation of the abundance of compact DM is from $2.3%$ to $25.2%$ in this mass range with the Bayesian analysis. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2206.13128v3

Astro arXiv | all categories
The Merger Rate of Primordial Black Hole-Neutron Star Binaries in Ellipsoidal-Collapse Dark Matter Halo Models

Astro arXiv | all categories

Play Episode Listen Later Sep 19, 2022 1:04


The Merger Rate of Primordial Black Hole-Neutron Star Binaries in Ellipsoidal-Collapse Dark Matter Halo Models by Saeed Fakhry et al. on Monday 19 September Primordial black holes (PBHs), as a potential macroscopic candidate for dark matter, can encounter other compact objects in dark matter halos because of their random distribution. Besides, the detection of gravitational waves (GWs) related to the stellar-mass black hole-neutron star (BH-NS) mergers raises the possibility that the BHs involved in such events may have a primordial origin. In this work, we calculate the merger rate of PBH-NS binaries within the framework of ellipsoidal-collapse dark matter halo models and compare it with the corresponding results derived from spherical-collapse dark matter halo models. Our results exhibit that ellipsoidal-collapse dark matter halo models can potentially amplify the merger rate of PBH-NS binaries in such a way that it is very close to the range estimated by the LIGO-Virgo observations. While spherical-collapse dark matter halo models cannot justify PBH-NS merger events as consistent results with the latest GW data reported by the LIGO-Virgo collaboration. In addition, we calculate the merger rate of PBH-NS binaries as a function of PBH mass and fraction within the context of ellipsoidal-collapse dark matter halo models. The results indicate that PBH-NS merger events with the mass of $(M_{PBH}le 5 M_{odot}, M_{NS}simeq 1.4 M_{odot})$ will be consistent with the LIGO-Virgo observations if $f_{PBH}simeq 1$. We also show that to have at least on $(M_{PBH}simeq 5 M_{odot}, M_{NS}simeq 1.4 M_{odot})$ event in the comoving volume $1 Gpc^{3}$ annually, ellipsoidal-collapse dark matter halo models constrain the abundance of PBHs as $f_{PBH} geq 0.1$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.08909v1

Astro arXiv | all categories
Spin it as you like: the lack of a measurement of the spin tilt distribution with LIGO-Virgo-KAGRA binary black holes

Astro arXiv | all categories

Play Episode Listen Later Sep 18, 2022 1:13


Spin it as you like: the lack of a measurement of the spin tilt distribution with LIGO-Virgo-KAGRA binary black holes by Salvatore Vitale et al. on Sunday 18 September The growing set of gravitational-wave sources is being used to measure the properties of the underlying astrophysical populations of compact objects, black holes and neutron stars. Most of the detected systems are black hole binaries. While much has been learned about black holes by analyzing the latest LIGO-Virgo-KAGRA (LVK) catalog, GWTC-3, a measurement of the astrophysical distribution of the black hole spin orientations remains elusive. This is usually probed by measuring the cosine of the tilt angle ($costau$) between each black hole spin and the orbital angular momentum, $costau=+1$ being perfect alignment. Abbott et al. (2021e) has modeled the $costau$ distribution as a mixture of an isotropic component and a Gaussian component with mean fixed at $+1$ and width measured from the data. In this paper, we want to verify if the data require the existence of such a peak at $costau=+1$. We use various models for the astrophysical tilt distribution and find that a) Augmenting the LVK model such that the mean of the Gaussian is not fixed at $+1$ returns results that strongly depend on priors. If we allow $mu>+1$ then the resulting astrophysical $costau$ distribution peaks at $+1$ and looks linear, rather than Gaussian. If we constrain $-1leq muleq+1$ the Gaussian component peaks at $mu=0.47^{+0.47}_{-1.04}$ (median and 90% symmetric credible interval). Two other 2-component mixture models yield $costau$ distributions that either have a broad peak centered at $0.20^{+0.21}_{-0.18}$ or a plateau that spans the range $[-0.5, +1]$, without a clear peak at $+1$. b) All of the models we considered agree on the fact that there is textit{no} excess of black hole tilts at around $-1$. c) While yielding quite different posteriors, the models considered in this work have Bayesian evidences that are the same within error bars. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.06978v2

Astro arXiv | all categories
Spin it as you like: the lack of a measurement of the spin tilt distribution with LIGO-Virgo-KAGRA binary black holes

Astro arXiv | all categories

Play Episode Listen Later Sep 15, 2022 1:04


Spin it as you like: the lack of a measurement of the spin tilt distribution with LIGO-Virgo-KAGRA binary black holes by Salvatore Vitale et al. on Thursday 15 September The growing set of gravitational-wave sources is being used to measure the properties of the underlying astrophysical populations of compact objects, black holes and neutron stars. Most of the detected systems are black hole binaries. While much has been learned about black holes by analyzing the latest LIGO-Virgo-KAGRA (LVK) catalog, GWTC-3, a measurement of the astrophysical distribution of the black hole spin orientations remains elusive. This is usually probed by measuring the cosine of the tilt angle ($costau$) between each black hole spin and the orbital angular momentum, $costau=+1$ being perfect alignment. Abbott et al. (2021e) has modeled the $costau$ distribution as a mixture of an isotropic component and a Gaussian component with mean fixed at $+1$ and width measured from the data. In this paper, we want to verify if the data require the existence of such a peak at $costau=+1$. We use various models for the astrophysical tilt distribution and find that a) Augmenting the LVK model such that the mean of the Gaussian is not fixed at $+1$ returns results that strongly depend on priors. If we allow $mu>+1$ then the resulting astrophysical $costau$ distribution peaks at $+1$ and looks linear, rather than Gaussian. If we constrain $-1leq muleq+1$ the Gaussian component peaks at $mu=0.47^{+0.47}_{-1.04}$ (median and 90% symmetric credible interval). Two other 2-component mixture models yield $costau$ distributions that either have a broad peak centered at $0.20^{+0.21}_{-0.18}$ or a plateau that spans the range $[-0.5, +1]$, without a clear peak at $+1$. b) All of the models we considered agree on the fact that there is textit{no} excess of black hole tilts at around $-1$. c) While yielding quite different posteriors, the models considered in this work have Bayesian evidences that are the same within error bars. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.06978v1

Astro arXiv | all categories
Self-gravitating disks around rapidly spinning, tilted black holes: General relativistic simulations

Astro arXiv | all categories

Play Episode Listen Later Sep 12, 2022 0:47


Self-gravitating disks around rapidly spinning, tilted black holes: General relativistic simulations by Antonios Tsokaros et al. on Monday 12 September We perform general relativistic simulations of self-gravitating black hole-disks in which the spin of the black hole is significantly tilted ($45^circ$ and $90^circ$) with respect to the angular momentum of the disk and the disk-to-black hole mass ratio is $16%-28%$. The black holes are rapidly spinning with dimensionless spins up to $sim 0.97$. These are the first self-consistent hydrodynamic simulations of such systems, which can be prime sources for multimessenger astronomy. In particular tilted black hole-disk systems lead to: i) black hole precession; ii) disk precession and warping around the black hole; iii) earlier saturation of the Papaloizou-Pringle instability compared to aligned/antialigned systems, although with a shorter mode growth timescale; iv) acquisition of a small black-hole kick velocity; v) significant gravitational wave emission via various modes beyond, but as strong as, the typical $(2,2)$ mode; and vi) the possibility of a broad alignment of the angular momentum of the disk with the black hole spin. This alignment is not related to the Bardeen-Petterson effect and resembles a solid body rotation. Our simulations suggest that any electromagnetic luminosity from our models may power relativistic jets, such as those characterizing short gamma-ray bursts. Depending on the black hole-disk system scale the gravitational waves may be detected by LIGO/Virgo, LISA and/or other laser interferometers. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.04454v1

Astro arXiv | all categories
Hydrodynamical Evolution of Black-Hole Binaries Embedded in AGN Discs

Astro arXiv | all categories

Play Episode Listen Later Sep 8, 2022 0:51


Hydrodynamical Evolution of Black-Hole Binaries Embedded in AGN Discs by Rixin Li et al. on Thursday 08 September Stellar-mass binary black holes (BBHs) embedded in active galactic nucleus (AGN) discs are possible progenitors of black-hole mergers detected in gravitational waves by LIGO/VIRGO. To better understand the hydrodynamical evolution of BBHs interacting with the disc gas, we perform a suite of high-resolution 2D simulations of binaries in local disc (shearing-box) models, considering various binary mass ratios, eccentricities and background disc properties. We use the $gamma$-law equation of state and adopt a robust post-processing treatment to evaluate the mass accretion rate, torque and energy transfer rate on the binary to determine its long-term orbital evolution. We find that circular comparable-mass binaries contract, with an orbital decay rate of a few times the mass doubling rate. Eccentric binaries always experience eccentricity damping. Prograde binaries with higher eccentricities or smaller mass ratios generally have slower orbital decay rates, with some extreme cases exhibiting orbital expansion. The averaged binary mass accretion rate depends on the physical size of the accretor. The accretion flows are highly variable, and the dominant variability frequency is the apparent binary orbital frequency (in the rotating frame around the central massive BH) for circular binaries but gradually shifts to the radial epicyclic frequency as the binary eccentricity increases. Our findings demonstrate that the dynamics of BBHs embedded in AGN discs is quite different from that of isolated binaries in their own circumbinary discs. Furthermore, our results suggest that the hardening timescales of the binaries are much shorter than their migration timescales in the disc, for all reasonable binary and disc parameters. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2202.07633v2

Ça Se Passe Là-Haut
#1347 : La vitesse de recul d'un trou noir issu d'une fusion mesurée pour la première fois

Ça Se Passe Là-Haut

Play Episode Listen Later Jun 4, 2022 9:45


Des astrophysiciens viennent de déterminer la vitesse de recul du trou noir résultant d'une fusion de deux trous noirs stellaires détectée par LIGO/Virgo. C'est grâce au signal des ondes gravitationnelles que ce "kick" a pu être estimé pour la première fois, indiquant une vitesse élevée, à même de délier ce trou noir de sa galaxie. L'étude est parue dans Physical Review Letters.

Wszechnica.org.pl - Nauka
292. Astronomia wielu nośników, czyli jak zaobserwować krótkie grb od środka i po wierzchu - dr Adam Zadrożny

Wszechnica.org.pl - Nauka

Play Episode Listen Later May 12, 2022 20:12


Zapraszamy na kolejny wykład w ramach wydarzenia „Maraton z wykładową Deltą”, podczas którego można usłyszeć o informatyce, matematyce, fizyce oraz astronomii. dr Adam Zadrożny - University of Texas Rio Grande Valley, Narodowe Centrum Badań Jądrowych, University College Dublin, Albert Einstein Institute, Kolegium MISMaP UW, ICM UW. Jego główne zainteresowania badawcze leżą na styku astronomii obserwacyjnej astronomii fal grawitacyjnych. Pasjonuje go możliwość obejrzenia tego jak niektóre procesy astronomiczne się zaczynają (w zasadzie zajrzenia do ich środka), dzięki falom grawitacyjnym, i przyjrzenia się temu jak się kończą dzięki optycznym obserwacjom. Od 2009 jest częścią zespołu konsorcjum LIGO-Virgo od fal grawitacyjnych. Obecnie pracuje w teamie TOROS (University of Texas Rio Grande Valley), którego celem jest jak najdokładniejsza obserwacja optyczna zjawisk takich jak kilonowe związanych ze zlewaniem się dwóch gwiazd neutronowych. Materiał dostępny dzięki współpracy z czasopismem Delta http://www.deltami.edu.pl/ Znajdź nas: https://www.facebook.com/WszechnicaFWW1/ https://anchor.fm/wszechnicaorgpl---historia https://anchor.fm/wszechnica-fww-nauka wszechnica.org.pl

Ça Se Passe Là-Haut
#1333 : Les trous noirs détectés par LIGO/Virgo/Kagra sont-ils la matière noire ?

Ça Se Passe Là-Haut

Play Episode Listen Later May 6, 2022 10:44


Les trous noirs détectés par LIGO/Virgo/Kagra sont-ils des trous nés dans l'Univers primordial et responsables de la masse manquante attribuées à la matière noire ? C'est à cette question que viennent de répondre une équipe d'astrophysiciens dans deux articles parus simultanément dans The Astrophysical Journal et The Astrophysical Journal Letters.

Ça Se Passe Là-Haut
#1332 : Le grossissement des trous noirs intermédiaires dans les noyaux galactiques

Ça Se Passe Là-Haut

Play Episode Listen Later May 4, 2022 9:24


La plupart des modèles d'évolution stellaire prédisent que les trous noirs ne devraient pas exister au-delà d'environ 50 M⊙, la limite inférieure de la "zone interdite" par le processus de supernova par instabilité de paires. Mais comme les récentes détections de LIGO/Virgo indiquent l'existence de trous noirs avec des masses égales ou supérieures à ce seuil, il faut bien leur trouver une origine. Dans une nouvelle étude, une équipe d'astrophysiciens montre que des trous noirs de plusieurs dizaines de masses solaires, voire plus encore, peuvent se former efficacement dans les noyaux galactiques très peuplés en étoiles. Ils publient leur article dans The Astrophysical Journal Letters.

Astronomia al Planetario
Onde Gravitazionali: " Ripples in Spacetime"

Astronomia al Planetario

Play Episode Listen Later Feb 21, 2022 60:29


Bentornati! Oggi insieme a due vecchie conoscenze del podcast parliamo di onde gravitazionali, da dove nascono, dove siamo arrivati, cosa ci dicono e come questo è solo l'inizio di una ricerca per vedere gli albori del cosmo. Ringrazio per la puntata Adamo Cerioli e Samuele Faglioni che mi hanno aiutato a preparare la puntata portando un contributo fondamentale a questa puntata.Per chi volesse approfondire, oltre al contattarci consiglio di leggere Lezioni di Fisica del Corriere della Sere scritto da Fulvio Ricci, o anche nei link seguenti.Link al video di Luca Nardi : https://www.youtube.com/watch?v=ipfZbwctCms&t=268sLink al video di Amedeo Balbi : https://www.youtube.com/watch?v=cUa0tI5sK-E Sito di Ligo : https://www.ligo.caltech.edu/page/aboutSito di Virgo : https://www.virgo-gw.eu/#homeSito di Einstein Telescope : http://www.et-gw.eu/Ultima data release di Ligo-Virgo : https://dcc.ligo.org/public/0170/P2000318/008/o3b_catalog.pdfPer seguirci sui nostri social :-Facebook: https://www.facebook.com/planetariodimodena-Instagram: https://www.instagram.com/planetariomodena/-Twitter: https://twitter.com/planetario_mo-Sito : https://www.planetariodimodena.it/Music Fanfare for Space by Kevin MacLeodLink: https://incompetech.filmmusic.io/song/3736-fanfare-for-spaceLicense: https://filmmusic.io/standard-license

Weekly Space Hangout
Weekly Space Hangout: December 29, 2021 — Do Black Holes Grow as the Universe Expands? Dr. Kevin Croker Explains Cosmological Coupling

Weekly Space Hangout

Play Episode Listen Later Dec 31, 2021 55:39


This week marks the final episode of 2021, and we are excited to welcome Dr. Kevin Croker from University of Hawai'i at Mānoa! Kevin led a team that compared data from simulated black hole mergers with that from gravitational waves detected by the LIGO–Virgo collaboration. This comparison led to a surprising conclusion: ignoring the expansion of the universe may be limiting the scientific understanding of black-hole physics. The team hypothesizes that that as the universe expands outward following the Big Bang, all objects with mass grow as well - and Black Holes are no exception. This new process has been dubbed "Cosmological Coupling." Kevin Croker is an affiliate graduate faculty at the University of Hawai'i at Mānoa. His research interest is Einstein's theory of gravitation and General Relativity (GR). He is currently exploring the observational consequences of cosmological energy shifts within relativistic compact objects (e.g. stellar collapse remnants such as GEODEs and neutron stars). His thesis work focused on cosmological applications of GR, in particular, the Dark Energy problem, and his past work has focused on the use of numerical simulations to compare and constrain proposed extensions of GR through existing astrophysical data. He firmly believes that observation is paramount. You can read about Kevin's research in articles at PhysicsWorld: https://physicsworld.com/a/cosmological-coupling-is-making-black-holes-bigger-study-suggests/ and LiveScience: https://www.livescience.com/black-holes-expanding-with-universe The research is also described in The Astrophysical Journal Letters: https://iopscience.iop.org/article/10.3847/2041-8213/ac2fad You can learn more about Kevin and his research on his website: https://www.phys.hawaii.edu/~kcroker/ **************************************** The Weekly Space Hangout is a production of CosmoQuest. Want to support CosmoQuest? Here are some specific ways you can help: ► Subscribe FREE to our YouTube channel at https://www.youtube.com/c/cosmoquest ► Subscribe to our podcasts Astronomy Cast and Daily Space where ever you get your podcasts! ► Watch our streams over on Twitch at https://www.twitch.tv/cosmoquestx – follow and subscribe! ► Become a Patreon of CosmoQuest https://www.patreon.com/cosmoquestx ► Become a Patreon of Astronomy Cast https://www.patreon.com/astronomycast ► Buy stuff from our Redbubble https://www.redbubble.com/people/cosmoquestx ► Join our Discord server for CosmoQuest - https://discord.gg/X8rw4vv ► Join the Weekly Space Hangout Crew! - http://www.wshcrew.space/ Don't forget to like and subscribe! Plus we love being shared out to new people, so tweet, comment, review us... all the free things you can do to help bring science into people's lives.

The 365 Days of Astronomy, the daily podcast of the International Year of Astronomy 2009
Weekly Space Hangout - Dr. Kevin Croker Explains "Cosmological Coupling"

The 365 Days of Astronomy, the daily podcast of the International Year of Astronomy 2009

Play Episode Listen Later Dec 31, 2021 64:41


https://youtu.be/Mgnsd1eoekE [Editor Rich: I'm not sure that there's anything we can do about the audio dropout problem till Fraser can move into his new house/studio next summer. Please bear with us while we try to be flexible. Thank you!] Host: Fraser Cain ( @fcain ) Special Guest: This week marks the final episode of 2021, and we are excited to welcome Dr. Kevin Croker from University of Hawai'i at Mānoa! Kevin led a team that compared data from simulated black hole mergers with that from gravitational waves detected by the LIGO–Virgo collaboration. This comparison led to a surprising conclusion: ignoring the expansion of the universe may be limiting the scientific understanding of black-hole physics. The team hypothesizes that that as the universe expands outward following the Big Bang, all objects with mass grow as well - and Black Holes are no exception. This new process has been dubbed "Cosmological Coupling."   Kevin Croker is a theoretical astrophysicist in the Department of Physics and Astronomy at the University of Hawai`i at Manoa. He received his PhD in Hawai`i under the supervision of Dr. John Learned, with guidance from Dr. Joel Weiner in the Department of Mathematics and members of the Institute for Astronomy.   Kevin's research focuses on formal aspects and observational consequences of Einstein's theory of gravitation, General Relativity.   Prior to graduate training in physics, Kevin worked as lead engineer for the underground radio station KWUR 90.3FM at Washington University in St. Louis, where he received an undergraduate degree in Computer Science.   He is a Fulbright program alumnus and enjoys living, working, and exploring in any place that will have him.   You can read about Kevin's research in articles at PhysicsWorld: https://physicsworld.com/a/cosmologic... and LiveScience: https://www.livescience.com/black-hol...     The research is also described in The Astrophysical Journal Letters: https://iopscience.iop.org/article/10... Regular Guests: Dr. Kimberly Cartier ( http://KimberlyCartier.org & @AstroKimCartier ) Dave Dickinson ( http://astroguyz.com/ & @Astroguyz ) This week's stories: - JWST! - Planets gone rogue? - What's coming up in 2022.   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.  Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too!  Every bit helps! Thank you! ------------------------------------ Do go visit http://www.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations.  Thank you! (Haven't donated? It's not too late! Just click!) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.

逐工一幅天文圖 APOD Taigi
313. 19 擺 ê 重力波頻譜圖 ft. 阿錕 (20211207)

逐工一幅天文圖 APOD Taigi

Play Episode Listen Later Dec 25, 2021 1:46


逐改若是有兩个 烏洞相碰,to̍h 會 tī 宇宙發出足大聲 ê 重力波。人類到 7 年前才有法度聽著這个 特別 ê 聲,毋閣咱已經 tī 前三輪觀測聽著 90 擺事件矣。這張圖 是頻譜圖,是重力波頻率 kah 時間 ê 關係。這 90 擺事件是用 LIGO (美國) VIRGO、(歐洲)、kah KAGRA (日本) ê 大型探測器揣著 ê。相碰事件 ê 能量 傳到 地球 若是愈強,顯示 tī 圖內底 ê to̍h 會 愈光。這是科學界新 ê 發展,重力輻射 ê 聲 予咱發現講,烏洞 kah 中子星比咱知影 ê 閣較濟,嘛予咱一个新 ê 方式去 量宇宙 ê 脹大率。第四輪 ê 重力波觀測 會 tī 2022 年 ê 12 月,會有較懸 ê 敏感度。 ——— 這是 NASA Astronomy Picture of the Day ê 台語文 podcast 原文版:https://apod.nasa.gov/ 台文版:https://apod.tw/ 今仔日 ê 文章: https://apod.tw/daily/20211207/ 影像:Gregg RuppelNSF, LIGO, VIRGO, KAGRA, Georgia Tech, Vanderbilt U.; Graphic : Sudarshan Ghonge & Karan Jani 音樂:PiSCO - 鼎鼎 聲優:阿錕 翻譯:An-Li Tsai (NCU) 原文:https://apod.nasa.gov/apod/ap211207.html Powered by Firstory Hosting

Physics World Weekly Podcast
Materials science conserves 500-year-old warship, new gravitational-wave discoveries by LIGO–Virgo

Physics World Weekly Podcast

Play Episode Listen Later Nov 25, 2021 45:11


In this podcast we chat with the chief executive of the Mary Rose Trust and LIGO–Virgo physicists at Cardiff University

Coffee Break: Señal y Ruido
Ep341: Gravitondas; Monopolos; Fluidos en Roca Porosa; Agua en Galaxias; Agujeros Negros

Coffee Break: Señal y Ruido

Play Episode Listen Later Nov 11, 2021 160:31


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Estopa y calaverita (min 5:00); Nuevas detecciones de gravitondas por LIGO+VIRGO (17:30); Buscando los monopolos magnéticos (59:00); Fluidos políméricos en roca porosa (1:20:00); Detección de H2O y CO en galaxias jóvenes y distantes (1:42:00); Simulando los chorros del agujero negro de M87 (1:55:00); Señales de los oyentes (2:20:15). Contertulios: Sara Robisco, Gastón Giribet, Alberto Aparici, Francis Villatoro, Héctor Socas. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. CB:SyR es una actividad del Museo de la Ciencia y el Cosmos de Tenerife.

Ça Se Passe Là-Haut
#1195 : Deux fusions trou noir-étoile à neutrons détectées par LIGO/Virgo pour la première fois

Ça Se Passe Là-Haut

Play Episode Listen Later Jun 29, 2021 12:03


Pour la première fois, les interféromètres gravitationnel LIGO et Virgo ont détecté une fusion entre un trou noir et une étoile à neutrons. Et il n'y en pas qu'une seule, il y en a eu deux espacées de 10 jours en janvier 2020. Ça valait le coup de faire un seul article pour parler des deux en même temps. Et c'est la première fois que des fusions mixtes de ce genre sont clairement identifiées par leurs ondes gravitationnelles. Les chercheurs des collaborations LIGO, Virgo et KAGRA publient leurs découvertes dans The Astrophysical Journal Letters sous le titre Observation of Gravitational Waves from Two Neutron Star–Black Hole Coalescences.

Noosfera
Noosfera 54. Ondas gravitacionales: cuando el espacio-tiempo tiembla | Alicia Sintes

Noosfera

Play Episode Listen Later Jun 11, 2021 68:26


El 14 de septiembre de 2014 detectamos por primera vez ondas gravitacionales. Fue un momento emocionante para todo aficionado a la física, pero había algo más. Tras esa predicción cumplida de la relatividad de Einstein había un mundo por descubrir para los astrónomos. Las ondas gravitacionales serían una nueva forma de obtener información del cosmos, diferente de las famosas ondas electromagnéticas, capaces de recorrer las distancias más increíbles hasta alcanzar a nuestro pequeño planeta azul.Para hablar sobre ello tenemos con nosotros a Alicia Sintes. Alicia comenzó su carrera investigadora en la Universidad de las Islas Baleares (UIB), donde se Licenció en 1992 y doctoró en 1996. Continuó como investigadora postdoctoral en el Instituto Max Planck de Física Gravitacional en Alemania. Su investigación se centra en el campo de la astronomía de ondas gravitacionales. En la actualidad es la investigadora principal del grupo de Física Gravitacional de la UIB y secretaria del Instituto de Aplicaciones Computacionales y Código Comunitario. También es miembro del Instituto de Estudios Espaciales de Cataluña y del Instituto Menorquín de Estudios.Sintes forma parte del consejo de LIGO, del comité ejecutivo de GEO, del consorcio LISA y del Telescopio Einstein. Sintes ha sido asesora de la Agencia Espacial Europea, miembro de la junta directiva de la Sociedad Española de Gravitación y Relatividad y editora de la revista Astroparticle Physics. Además, ha dirigido los grupos de análisis de ondas continuas LIGO-Virgo, de estimación de parámetros para LISA y de caracterización del detector GEO.Sintes fue nombrada Hija Predilecta de Sant Lluís en 2018 y ha recibido numerosos premios, incluido el Ramon Llull del Gobierno de las Islas Baleares, el Bartomeu Oliver de la Obra Cultural Balear, Sincronizados de la Agencia SINC y miembro de la Selección Española de Ciencia de QUO, entre otros. Ha dirigido siete tesis doctorales y ha publicado más de 270 artículos científicos.

Astrophiz Podcasts
Astrophiz124-Shanika Galaudage-Gravitational Waves

Astrophiz Podcasts

Play Episode Listen Later Apr 15, 2021 55:43


Out now, Astrophiz124 ~ Shanika Galaudage - Gravitational waves and population studies Listen: Shanika Galaudage is riding the crest of the wave of Gravitational Wave Astronomy with zest and a clear vision to make the complex science of GW astronomy accessible and understandable to her audience. Shanika is a remarkable early career Gravitational Wave astrophysicist who is doing fabulous population studies with gravitational wave data from the most recent LIGO/Virgo observation runs as a Monash University PhD candidate and OzGrav Researcher based in Melbourne, Australi

WiTcast
WiTcast 88.1.1 – ฉลอง 8 ขวบ / สรุปข่าววิทย์ 2020

WiTcast

Play Episode Listen Later Jan 17, 2021 108:48


สุดยอดข่าวการสำรวจอวกาศของมนุษยชาติในปี 2020 SpaceX Crew Dragon ส่งคนขึ้นสถานีอวกาศสำเร็จ 2 รอบแล้วในปี 2020 - 1,2,3,4,5 ปีนี้รอดูมิชชั่น AX-1 ส่ง Tom Cruise ไปอวกาศ - 1 และมิชชัน Space Adventures พานักท่องเที่ยวไปโคจรรอบโลก 3 วัน Nasa ส่งน้อง Perseverance ไปดาวอังคาร -1,2 OSIREX REx เก็บตัวอย่างดาวเคราะห์น้อย Bennu -1,2,3 ญี่ปุ่น Hayabusa2 เก็บตัวอย่างจากดาวเคราะห์น้อย Ryugu ส่งกลับโลกสำเร็จ -1,2 จีน Chang'e 5 เก็บตัวอย่างจากดวงจันทร์กลับมาสำเร็จ -1 สุดยอดข่าวการค้นพบทางดาราศาสตร์ 2020 ไขปริศนาต้นตอ FRB (Fast Radio Burst) -1 ,2,3,4,5 ดาวนิวตรอน และ Magnetar หลุมดำชนกัน / การค้นพบใหม่ๆ จากสถานีตรวจวัดคลื่นความโน้มถ่วง (gravitational wave) Ligo กับ Virgo - 1,2,3,4,5 ข่าวหอสังเกตการณ์ Arecibo พัง -1,2,3 ข่าวฟอสฟีน (Phosphine) บนดาวศุกร์ -1,2,3 ความก้าวหน้าทางการแพทย์และชีวิวทยา 2020 ข่าว AI ชื่อ Alpha Fold ของ DeepMind ไขปริศนา protein folding -1,2,3 Crispr Cas9 รักษา Sickel Cell Anemia ในคนสำเร็จ -1,2

天文随心听|讲述宇宙与人的故事
【原创严选】黑洞质量禁区真的存在吗?

天文随心听|讲述宇宙与人的故事

Play Episode Listen Later Sep 26, 2020 16:02


近日,LIGO-Virgo引力波探测国际合作组宣布发现了至今最强的黑洞碰撞,由85倍太阳质量和66倍太阳质量的两个黑洞环绕并合成为了一个142倍太阳质量的黑洞,其中约8倍的太阳质量的质量转化为能量巨大的引力波在时空中传播。论文一经上线,迅速引起业界高度关注和热议,因其涉及所谓“不可能质量”黑洞的问题。但这一黑洞质量“禁区”是不是真的存在,这又一定是双黑洞并合吗,中等质量黑洞都存在于哪里?

天文随心听|讲述宇宙与人的故事
【原创严选】黑洞质量禁区真的存在吗?

天文随心听|讲述宇宙与人的故事

Play Episode Listen Later Sep 26, 2020 16:02


近日,LIGO-Virgo引力波探测国际合作组宣布发现了至今最强的黑洞碰撞,由85倍太阳质量和66倍太阳质量的两个黑洞环绕并合成为了一个142倍太阳质量的黑洞,其中约8倍的太阳质量的质量转化为能量巨大的引力波在时空中传播。论文一经上线,迅速引起业界高度关注和热议,因其涉及所谓“不可能质量”黑洞的问题。但这一黑洞质量“禁区”是不是真的存在,这又一定是双黑洞并合吗,中等质量黑洞都存在于哪里?

天文随心听|讲述宇宙与人的故事
【原创严选】黑洞质量禁区真的存在吗?

天文随心听|讲述宇宙与人的故事

Play Episode Listen Later Sep 26, 2020 16:02


近日,LIGO-Virgo引力波探测国际合作组宣布发现了至今最强的黑洞碰撞,由85倍太阳质量和66倍太阳质量的两个黑洞环绕并合成为了一个142倍太阳质量的黑洞,其中约8倍的太阳质量的质量转化为能量巨大的引力波在时空中传播。论文一经上线,迅速引起业界高度关注和热议,因其涉及所谓“不可能质量”黑洞的问题。但这一黑洞质量“禁区”是不是真的存在,这又一定是双黑洞并合吗,中等质量黑洞都存在于哪里?

Coffee Break: Señal y Ruido
Ep284: LIGO+VIRGO (y 2); TENET (y 2); Redes Neuronales y Tablillas Babilonias

Coffee Break: Señal y Ruido

Play Episode Listen Later Sep 10, 2020 170:05


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Ampliamos la informacion de la semana pasada sobre la detección de LIGO+VIRGO, con Isabel Cordero (min 6:00); Recuperando algunos de los textos más antiguos con redes neuronales artificiales (57:00); Palíndromos y la historia del cuadrado mágico de TENET (1:36:00); Continuamos el análisis de la película TENET. Hay aviso antes de los spoilers (2:15:00). En la foto, de arriba a abajo y de izquierda a derecha: Isabel Cordero, Héctor Socas, María Ribe, Francis Villatoro, Alberto Aparici. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

Coffee Break: Señal y Ruido
Ep284: LIGO+VIRGO (y 2); TENET (y 2); Redes Neuronales y Tablillas Babilonias

Coffee Break: Señal y Ruido

Play Episode Listen Later Sep 10, 2020 170:05


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Ampliamos la informacion de la semana pasada sobre la detección de LIGO+VIRGO, con Isabel Cordero (min 6:00); Recuperando algunos de los textos más antiguos con redes neuronales artificiales (57:00); Palíndromos y la historia del cuadrado mágico de TENET (1:36:00); Continuamos el análisis de la película TENET. Hay aviso antes de los spoilers (2:15:00). En la foto, de arriba a abajo y de izquierda a derecha: Isabel Cordero, Héctor Socas, María Ribe, Francis Villatoro, Alberto Aparici. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

Podcast Radio Skylab
091 - Oscilación - LIGO-Virgo: Fusión de agujeros negros medianos · Mundos oceánicos del Sistema Solar

Podcast Radio Skylab

Play Episode Listen Later Sep 9, 2020 170:04


Desde el Atlántico para todo el Universo, un nuevo programa de Radio Skylab. El primer tema trata la fusión de agujeros negros medianos detectada por LIGO-Virgo. En el segundo tema hablamos de los mundos oceánicos del Sistema Solar. No faltarán a la cita las secciones de retroalimentación y recomendaciones. Carlos Pazos (Mola Saber), Daniel Marín (Eureka), Víctor Manchado (Pirulo Cósmico) y Víctor R. Ruiz (Infoastro) exploramos la ciencia, el espacio y otras curiosidades acompañados por un buen número de espaciotrastornados. ¡Únete!

Podcast Radio Skylab
091 - Oscilación - LIGO-Virgo: Fusión de agujeros negros medianos · Mundos oceánicos del Sistema Solar

Podcast Radio Skylab

Play Episode Listen Later Sep 9, 2020 170:04


Desde el Atlántico para todo el Universo, un nuevo programa de Radio Skylab. El primer tema trata la fusión de agujeros negros medianos detectada por LIGO-Virgo. En el segundo tema hablamos de los mundos oceánicos del Sistema Solar. No faltarán a la cita las secciones de retroalimentación y recomendaciones. Carlos Pazos (Mola Saber), Daniel Marín (Eureka), Víctor Manchado (Pirulo Cósmico) y Víctor R. Ruiz (Infoastro) exploramos la ciencia, el espacio y otras curiosidades acompañados por un buen número de espaciotrastornados. ¡Únete!

Coffee Break: Señal y Ruido
Ep283: TENET; Agujeros negros de LIGO+VIRGO;

Coffee Break: Señal y Ruido

Play Episode Listen Later Sep 3, 2020 162:21


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Evento Carrington (min 5:00); App RADAR Covid (20:00); LIGO+VIRGO anuncia la detección de dos agujeros negros muy grandes (35:00); TENET, física y viajes en el tiempo en la nueva película de Nolan (1:38:00). En la foto, de arriba a abajo y de izquierda a derecha: Sara Robisco, Héctor Socas, Francis Villatoro, Alberto Aparici. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

Coffee Break: Señal y Ruido
Ep283: TENET; Agujeros negros de LIGO+VIRGO;

Coffee Break: Señal y Ruido

Play Episode Listen Later Sep 3, 2020 162:21


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Evento Carrington (min 5:00); App RADAR Covid (20:00); LIGO+VIRGO anuncia la detección de dos agujeros negros muy grandes (35:00); TENET, física y viajes en el tiempo en la nueva película de Nolan (1:38:00). En la foto, de arriba a abajo y de izquierda a derecha: Sara Robisco, Héctor Socas, Francis Villatoro, Alberto Aparici. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

Ça Se Passe Là-Haut
#1059 : Une fusion de trous noirs très asymétrique très riche en informations

Ça Se Passe Là-Haut

Play Episode Listen Later Aug 30, 2020 8:47


L'article en mode prépublication était sorti au mois d'avril dernier, et c'est seulement cette semaine qu'il est publié dans Physical Review D et que nous pouvons donc en parler. Je veux parler de la belle découverte des collaborations LIGO/Virgo de la fusion de deux trous noirs de masses très différentes, l'événement gravitationnel GW190412 qui remonte au 12 avril 2019. Avec 8 et 30 masses solaires, ce duo fut le premier couple de trous noirs asymétrique a être observé, mais il est vrai qu'il a été très vite éclipsé en juin dernier par la découverte (et la publication rapide) passionnante il est vrai d'un autre système encore plus asymétrique avec un trou noir de 23 masses solaires et un objet compact indéterminé de 2,6 masses solaires (GW190814 détecté le 14 août 2019). Mais il nous faut revenir sur ce premier couple asymétrique détecté seulement trois semaines après le début du troisième run d'observation des interféromètres gravitationnels car il a permis aux chercheurs de tester la Relativité Générale comme jamais auparavant et de bien mieux caractériser les trous noirs.

Coffee Break: Señal y Ruido
Ep273: Exceso en XENON1T; Gravitondas; Controversias Cosmológicas; Oxígeno y Tierra Helada;

Coffee Break: Señal y Ruido

Play Episode Listen Later Jun 25, 2020 186:49


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Premios Princesa de Asturias 2020; NASA y tecnomarcadores; Relación entre la gran oxidación y la "Tierra helada"; LIGO/VIRGO detecta ondas gravitacionales de un evento intrigante; Analizamos el resultado del experimento XENON1T; Polémica recalibración de distancias cosmológicas; Estrategia europea de física de partículas; Señales de los oyentes. En la foto, de arriba a abajo y de izquierda a derecha: Alberto Aparici, Héctor Socas, Francis Villatoro. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

Coffee Break: Señal y Ruido
Ep273: Exceso en XENON1T; Gravitondas; Controversias Cosmológicas; Oxígeno y Tierra Helada;

Coffee Break: Señal y Ruido

Play Episode Listen Later Jun 25, 2020 186:49


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Premios Princesa de Asturias 2020; NASA y tecnomarcadores; Relación entre la gran oxidación y la "Tierra helada"; LIGO/VIRGO detecta ondas gravitacionales de un evento intrigante; Analizamos el resultado del experimento XENON1T; Polémica recalibración de distancias cosmológicas; Estrategia europea de física de partículas; Señales de los oyentes. En la foto, de arriba a abajo y de izquierda a derecha: Alberto Aparici, Héctor Socas, Francis Villatoro. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace... y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

Ça Se Passe Là-Haut
#1042 : Détection gravitationnelle d'une fusion d'objets compacts très asymétrique

Ça Se Passe Là-Haut

Play Episode Listen Later Jun 23, 2020 10:45


Voilà une belle découverte obtenue par la détection d'ondes gravitationnelles : celle d'un objet à la frontière entre étoile à neutrons et trou noir. C'est la première détection d'ondes gravitationnelles par LIGO/Virgo qui a pour origine un couple aussi différent en terme de masses : 23,2 masses solaires pour le premier trou noir et seulement 2,6 masses solaires pour l'"autre objet"... car les chercheurs n'arrivent pas à savoir si c'est une (trop) grosse étoile à neutron ou bien un très petit trou noir... L'étude est parue dans The Astrophysical Journal Letters.

fusion voil compacts ligo virgo astrophysical journal letters
The 365 Days of Astronomy, the daily podcast of the International Year of Astronomy 2009
Weekly Space Hangout - Guest: Meng Jin - Modeling Coronal Mass Ejections

The 365 Days of Astronomy, the daily podcast of the International Year of Astronomy 2009

Play Episode Listen Later Mar 20, 2020 57:12


https://youtu.be/iHUOLvoFXjc Host: Fraser Cain ( @fcain )Special Guest: This week we are pleased to welcome Dr. Meng Jin, Research Scientist at the SETI Institute, to the Weekly Space Hangout. Meng uses numerical modeling techniques to analyze Coronal Mass Ejections (CMEs) and related events [e.g., CME-Driven Shocks and Solar Energetic Particles (SEPs).] By comparing these models with in-situ and remote sensing observations, a better understanding of the physical processes during the propagation of CMEs can be developed resulting in more accurate space weather forecasts which will help to better protect Astronauts and space-based equipment such as satellites and the ISS.   Recently, Meng's data modeling has expanded to include the simulation of stellar winds and CMEs for exo-solar and exo-planetary systems to study their influence on the habiitability of exo-planets.   Meng received his BS in Astronomy and MS in Astrophyiscs from Nanjing University, China. He was awarded his PhD in Space Physics & Scientific Computing from the University of Michigan in 2014 after which did his post-doc at Lockheed Martin Solar and Astrophysics Lab. From 2016-2017 Meng was a Project Scientist at UCAR, and in January 2018 he joined the SETI Institute as a Research Scientist.   You can read Meng's full bio here https://www.seti.org/our-scientists/m... To learn more about the SETI Institute, visit https://seti.org/ Regular Guests: Dr. Brian Koberlein ( https://briankoberlein.com/ & @BrianKoberlein ) Moiya McTier ( https://www.moiyamctier.com/ & @GoAstroMo ) Beth Johnson - SETI Institute ( @SETIInstitute / @planetarypan ) This week's stories: - The Gemini Planet Imager Exoplanet Survey, GPIES. https://www.seti.org/gemini-planet-imager-exoplanet-survey-gpies - Venus at Greatest Elongation. - Jupiter/Mars conjunction before dawn. - Heat on Mercury helps it make ice. What??? - Finding BH mergers from LIGO/VIRGO public data. - Co-host roundtable discussion of internet resources.   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you! ------------------------------------ Do go visit http://astrogear.spreadshirt.com/ for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just click!) The 365 Days of Astronomy Podcast is produced by Astrosphere New Media. http://www.astrosphere.org/ Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.

Wszechnica.org.pl - Nauka
54. Fale grawitacyjne – największe odkrycie XX wieku?

Wszechnica.org.pl - Nauka

Play Episode Listen Later Feb 29, 2020 96:08


Debata inaugurująca XX Festiwal Nauki w Warszawie [21 września 2016] We wrześniu i grudniu 2015 roku detektory działające w ramach projektu Ligo zarejestrowały fale grawitacyjne, o których istnieniu przypuszczano na podstawie teoretycznych obliczeń od blisko stu lat. Odkrycie spotkało się z zainteresowaniem mediów na całym świecie. Historia badań nad falami grawitacyjnymi, nowe perspektywy dla nauki po potwierdzeniu ich istnienia oraz technika umożliwiająca ich rejestrację były tematem debaty, która zainaugurowała XX Festiwal Nauki w Warszawie. W debacie udział wzięli fizyk specjalizujący się w ogólnej teorii względności prof. dr hab. Andrzej Krasiński (Centrum Astronomiczne im. Mikołaja Kopernik PAN), astrofizyk zajmująca się symulacjami numerycznymi astrofizycznych źródeł fal grawitacyjnych oraz analizą danych z detektorów fal grawitacyjnych Virgo/Ligo prof. dr hab. Dorota Rosińska (Instytut Astronomii im. Janusza Gila UZ) oraz astrofizyk interesujący się m.in. teorią i detekcją fal grawitacyjnych w projekcie Ligo/Virgo prof. dr hab. Michał Bejger (Centrum Astronomiczne im. Mikołaja Kopernik PAN). Jego wykład zilustrowany został doświadczeniami autorstwa dr. Jana Grabskiego (Zakład Fizyki Jądrowej na Wydziale Fizyki PW) Prof. Krasiński: Co to są fale grawitacyjne? Debatę rozpoczęło wystąpienie prof. Krasińskiego, który opowiedział czym są fale grawitacyjne oraz o historii badania tego zjawiska. Jak mówił fizyk, fale grawitacyjne to oderwane od źródła impulsy pola grawitacyjnego. Przechodząc przez dowolny obiekt materialny, wywołują ruchy przyspieszone jednych elementów obiektu względem innych. Są wielokrotnie słabsze niż fale elektromagnetyczne, dlatego o wiele trudniej było je wykryć. Przypuszczenie dotyczące istnienia fal grawitacyjnych wysunął już w 1916 roku Albert Einstein, który dowiódł, że istnieją uproszczone rozwiązania równań pola grawitacyjnego, które są podobne do rozwiązań równań elektrodynamiki opisujących płaskie fale elektromagnetyczne. W 1937 roku sam uczony zwątpił jednak w ich istnienie (mimo że było to wynikiem przyjęcia błędnego założenia w jego kolejnej pracy przygotowanej na ten temat razem z Nathanem Rosenem – co zauważył i poprawił jej recenzent Howard Robinson). Trzeba było dopiero ustaleń Hermanna Bondiego, Felixa Piraniego i Ivora Robinsona oraz Polaka Andrzeja Trautmana dokonanych na przełomie lat 50. i 60., żeby ostatecznie potwierdzić ich istnienie w teorii. Dały one pewność, że fale grawitacyjne przenoszą energię i mogą je emitować źródła o skończonych rozmiarach – dało to podstawę do rozpoczęcia prób ich zarejestrowania.

Universe Today Podcast
Episode 618: The Future Of Gravitational Waves. Seeing Every Black Hole Collision In The Observable Universe?

Universe Today Podcast

Play Episode Listen Later Jan 24, 2020


In 2015, scientists discovered the telltale signal from ripples of spacetime sweeping over the Earth. It was the very first direct detection of gravitational waves, generated by the merger of two massive black holes 1.3 billion light-years away. This discovery was the culmination of decades of research and construction of huge instruments called interferometers to detect the warping of spacetime caused by gravitational waves. Today, the most advanced detectors, the LIGO/VIRGO collaboration, have turned up over 50 gravitational wave discoveries - on average one every week - allowing astronomers to perceive the Universe in a completely different way. What new gravitational wave instruments are in the works, and what does the future hold for this relatively new field of study? Our Book is out! https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/ Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio Weekly email newsletter: https://www.universetoday.com/newsletter Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/ Astronomy Cast: https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg Support us at https://www.patreon.com/universetoday More stories at https://www.universetoday.com/ Twitch: https://twitch.tv/fcain Twitter: @universetoday Facebook: https://www.facebook.com/universetoday Instagram - https://instagram.com/universetoday Team: Fraser Cain - @fcain / frasercain@gmail.com Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - weber.chad@gmail.com References: https://www.ligo.caltech.edu/page/what-is-interferometer https://www.ligo.caltech.edu/system/media_files/binaries/313/original/LIGOHistory.pdf https://gwcenter.icrr.u-tokyo.ac.jp/en/plan http://www.gw-indigo.org/tiki-index.php https://www.osa-opn.org/home/articles/volume_29/may_2018/features/gravitational_waves_the_road_ahead/ http://www.et-gw.eu/ https://tds.virgo-gw.eu/?call_file=ET-0106C-10.pdf https://cosmicexplorer.org/ https://arxiv.org/ftp/arxiv/papers/1907/1907.04833.pdf https://sci.esa.int/web/lisa/-/61367-mission-summary https://sci.esa.int/web/lisa-pathfinder/-/59238-lisa-pathfinder-to-conclude-trailblazing-mission https://arxiv.org/pdf/1907.11305.pdfSupport Universe Today Podcast

earth universe twitch references black holes collisions gravitational waves our book astronomy cast observable universe ligo virgo weekly space hangout universe today ultimate viewing cosmos
Universe Today Podcast
Episode 618: The Future Of Gravitational Waves. Seeing Every Black Hole Collision In The Observable Universe?

Universe Today Podcast

Play Episode Listen Later Jan 24, 2020 14:39


In 2015, scientists discovered the telltale signal from ripples of spacetime sweeping over the Earth. It was the very first direct detection of gravitational waves, generated by the merger of two massive black holes 1.3 billion light-years away. This discovery was the culmination of decades of research and construction of huge instruments called interferometers to detect the warping of spacetime caused by gravitational waves. Today, the most advanced detectors, the LIGO/VIRGO collaboration, have turned up over 50 gravitational wave discoveries - on average one every week - allowing astronomers to perceive the Universe in a completely different way. What new gravitational wave instruments are in the works, and what does the future hold for this relatively new field of study? Our Book is out! https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/ Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio Weekly email newsletter: https://www.universetoday.com/newsletter Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/ Astronomy Cast: https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg Support us at https://www.patreon.com/universetoday More stories at https://www.universetoday.com/ Twitch: https://twitch.tv/fcain Twitter: @universetoday Facebook: https://www.facebook.com/universetoday Instagram - https://instagram.com/universetoday Team: Fraser Cain - @fcain / frasercain@gmail.com Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - weber.chad@gmail.com References: https://www.ligo.caltech.edu/page/what-is-interferometer https://www.ligo.caltech.edu/system/mediafiles/binaries/313/original/LIGOHistory.pdf https://gwcenter.icrr.u-tokyo.ac.jp/en/plan http://www.gw-indigo.org/tiki-index.php https://www.osa-opn.org/home/articles/volume29/may2018/features/gravitationalwavestheroadahead/ http://www.et-gw.eu/ https://tds.virgo-gw.eu/?callfile=ET-0106C-10.pdf https://cosmicexplorer.org/ https://arxiv.org/ftp/arxiv/papers/1907/1907.04833.pdf https://sci.esa.int/web/lisa/-/61367-mission-summary https://sci.esa.int/web/lisa-pathfinder/-/59238-lisa-pathfinder-to-conclude-trailblazing-mission https://arxiv.org/pdf/1907.11305.pdf

Ça Se Passe Là-Haut
#961 : Détection d'une fusion d'étoiles à neutrons de grande masse

Ça Se Passe Là-Haut

Play Episode Listen Later Jan 7, 2020 8:39


L'événement gravitationnel GW 190425 vient d'être publié par la collaboration LIGO/Virgo, et ce n'est pas n'importe quel événement gravitationnel : il s'agit de la deuxième fusion très très probable de 2 étoiles à neutrons, avec cette fois-ci une masse totale des deux composantes qui est élevée par rapport aux couples d'étoiles à neutrons que l'on connaît classiquement : 3,4 masses solaires. Aucun signal électromagnétique n'a hélas pu être trouvé en coïncidence.

Coffee Break: Señal y Ruido
Ep242: Geometría Cosmológica; Oxígeno, el Nuevo Misterio de Marte; Terremotos: Precursores y Réplicas

Coffee Break: Señal y Ruido

Play Episode Listen Later Nov 21, 2019 163:49


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: LIGO/VIRGO retracta la reciente alerta por una señal desconocida (9:20); James Peebles y sus declaraciones contra la teoría del Big Bang (18:30); Espectroscopía multifibra (33:00); Starlink (40:10); TMT y EST (50:30); Terremotos: precursores y réplicas (56:00); Curiosity detecta variaciones estacionales del oxígeno en Marte (1:09:00); Cosmología (1:38:45). En la foto, de arriba a abajo y de izquierda a derecha: Francis Villatoro, Ángel López-Sánchez, Alberto Aparici, Carlos Westendorp, Héctor Socas. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

Coffee Break: Señal y Ruido
Ep242: Geometría Cosmológica; Oxígeno, el Nuevo Misterio de Marte; Terremotos: Precursores y Réplicas

Coffee Break: Señal y Ruido

Play Episode Listen Later Nov 21, 2019 163:49


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: LIGO/VIRGO retracta la reciente alerta por una señal desconocida (9:20); James Peebles y sus declaraciones contra la teoría del Big Bang (18:30); Espectroscopía multifibra (33:00); Starlink (40:10); TMT y EST (50:30); Terremotos: precursores y réplicas (56:00); Curiosity detecta variaciones estacionales del oxígeno en Marte (1:09:00); Cosmología (1:38:45). En la foto, de arriba a abajo y de izquierda a derecha: Francis Villatoro, Ángel López-Sánchez, Alberto Aparici, Carlos Westendorp, Héctor Socas. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

Coffee Break: Señal y Ruido
Ep241: Higía y la IAU; Arrokoth; Virus Contra el Cáncer; Gravitondas Desconocidas; Puertas Lógicas Cuánticas

Coffee Break: Señal y Ruido

Play Episode Listen Later Nov 14, 2019 151:29


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Higía y la polémica sobre la IAU y los planetas enanos (min 5:00); Arrokoth, el nombre definitivo de Ultima Thule (46:00); CF33, un virus que podría eliminar el cáncer (1:04:00); LIGO/VIRGO detecta una señal desconocida (1:23:00); Puertas lógicas en computación cuántica (1:45:40); Señales de los oyentes (2:14:00). En la foto, de arriba a abajo y de izquierda a derecha: Francis Villatoro, Alberto Aparici, Ignacio Crespo, Héctor Socas. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

Coffee Break: Señal y Ruido
Ep241: Higía y la IAU; Arrokoth; Virus Contra el Cáncer; Gravitondas Desconocidas; Puertas Lógicas Cuánticas

Coffee Break: Señal y Ruido

Play Episode Listen Later Nov 14, 2019 151:29


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Higía y la polémica sobre la IAU y los planetas enanos (min 5:00); Arrokoth, el nombre definitivo de Ultima Thule (46:00); CF33, un virus que podría eliminar el cáncer (1:04:00); LIGO/VIRGO detecta una señal desconocida (1:23:00); Puertas lógicas en computación cuántica (1:45:40); Señales de los oyentes (2:14:00). En la foto, de arriba a abajo y de izquierda a derecha: Francis Villatoro, Alberto Aparici, Ignacio Crespo, Héctor Socas. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración del Museo de la Ciencia y el Cosmos de Tenerife con el Área de Investigación y la UC3 del Instituto de Astrofísica de Canarias.

SexyNerdScience
SNS - S5E13

SexyNerdScience

Play Episode Listen Later May 11, 2019 100:21


Valve COSMORIFT | S5E13 The Battle for the North is over but the Nerd battles are just beginning. Dale seeks redemption from last weeks loss and we’re given a new battle for next week. Dale gets stuck between a Stark and a hard place as Dru and Josh gush over VR headsets. Lets get wasted away again in Margaritaville ...this is SexyNerdScience! -----Social Media Links----- Like us on Facebook: https://www.facebook.com/SexyNerdScience/ Follow us on Twitter: https://twitter.com/SexyNerdScience/ Subscribe to us on SoundCloud: https://soundcloud.com/sexynerdscience Subscribe to us on YouTube: https://www.youtube.com/channel/UC4M4cluXwmMa2cQM6CNShhA -----Support Links----- T-Shirt Sales: https://teespring.com/sexynerdscience-products Patreon: https://www.patreon.com/ProjectNerd -----Links----- Project-Nerd: https://www.project-nerd.com/ Ramadan https://www.militarynews.com/norfolk-navy-flagship/news/chaplains_corner/islamic-month-of-ramadan-a-brief-explanation/article_ad412f63-f9c4-53ed-8c67-7f324c8604ee.html Master and Apprentice https://starwars.fandom.com/wiki/Master_%26_Apprentice VR https://www.vive.com/us/cosmos/, https://www.oculus.com/quest/features/, https://www.oculus.com/rift-s/features/, https://store.steampowered.com/sub/354231/ Tesla Insurence https://www.teslarati.com/tesla-insurance-plan-elon-musk-vs-warren-buffett/ LIGO VIRGO https://www.sciencenews.org/article/ligo-virgo-made-5-likely-gravitational-wave-detections-month

The Big Beard Theory
215: Новые системы аварийного спасения экипажа и больше гравитационных волн

The Big Beard Theory

Play Episode Listen Later May 2, 2019 53:47


В это выпуске я рассказываю о крупном обновлении детекторов гравитационных волн LIGO и VIRGO, объясняю, почему в новых пилотируемых кораблях от SpaceX, Blue Origin и Boeing отказались от «классических» твердотопливных систем аварийного спасения экипажа, а также отвечаю на вопросы слушателей. Ведущий: Антон Поздняков Темы [00:00:33] ⋅⋅⋅ Приветствие [00:01:41] ⋅⋅⋅ Большое обновление детекторов гравитационных волн LIGO и VIRGO Статья: Что такое гравитационные волны Статья: Почему открытие гравитационных волн важно The Big Beard Theory 130 — Килонова [00:10:38] ⋅⋅⋅ Что именно улучшили и какие результаты это даст Приложение для нотификаций о гравитационных волнах [00:13:53] ⋅⋅⋅ Первые потенциальные результаты обновленных детекторов LIGO и VIRGO [00:19:15] ⋅⋅⋅ Новые системы аварийного спасения экипажа от SpaceX, Blue Origin и Boenig. Почему отказались от «классических» систем с башней [00:27:34] ⋅⋅⋅ Система аварийного спасения пассажирской капсулы Blue Origin [00:32:36] ⋅⋅⋅ Starliner и Crew Dragon: почему используются жидкостные двигатели [00:42:33] ⋅⋅⋅ Ответы на вопросы слушателей [00:43:33] ⋅⋅⋅ Что будет, если по «щелчку Таноса» исчезнет Луна [00:44:43] ⋅⋅⋅ Есть ли смысл строить массив телескопов на Луне [00:46:45] ⋅⋅⋅ Насколько важен материал стартового стола [00:49:31] ⋅⋅⋅ Случайна ли музыка во вступлении и концовке [00:50:10] ⋅⋅⋅ Прощание Поддержи Бородокаст

spacex blue origin ligo virgo beardycast big beard theory
Universe Today Podcast
Episode 513: 379: LIGO/Virgo Upgraded. A Black Hole Merger Every Week?

Universe Today Podcast

Play Episode Listen Later May 1, 2019


Support Universe Today Podcast

Universe Today Podcast
Episode 513: 379: LIGO/Virgo Upgraded. A Black Hole Merger Every Week?

Universe Today Podcast

Play Episode Listen Later May 1, 2019 9:14


Coffee Break: Señal y Ruido
Ep192: Descifrando Gobekli Tepe; La Historia del Universo en Rayos Gamma; Física Solar; Evolución de las Aves;LIGO/VIRGO

Coffee Break: Señal y Ruido

Play Episode Listen Later Dec 6, 2018 128:46


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Yacimiento de Gobekli Tepe: ¿Un posible paleoregistro de impactos cometarios?; Nueva técnica para investigar la historia del Universo usando rayos gamma y el fondo de luz intergaláctico; Cómo los cambios en la atmósfera terrestre influyeron en la evolución de las aves; Resultados de la misión CLASP para observar el complejo magnetismo solar; Nuevos resultados de LIGO+VIRGO con cuatro nuevas detecciones de ondas gravitacionales. En la foto, de arriba a abajo y de izquierda a derecha: Sara Robisco, Carlos González, Carlos Westendorp, Marian Martínez, Héctor Socas. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración entre el Área de Investigación y la Unidad de Comunicación y Cultura Científica (UC3) del Instituto de Astrofísica de Canarias.

Coffee Break: Señal y Ruido
Ep192: Descifrando Gobekli Tepe; La Historia del Universo en Rayos Gamma; Física Solar; Evolución de las Aves;LIGO/VIRGO

Coffee Break: Señal y Ruido

Play Episode Listen Later Dec 6, 2018 128:46


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Yacimiento de Gobekli Tepe: ¿Un posible paleoregistro de impactos cometarios?; Nueva técnica para investigar la historia del Universo usando rayos gamma y el fondo de luz intergaláctico; Cómo los cambios en la atmósfera terrestre influyeron en la evolución de las aves; Resultados de la misión CLASP para observar el complejo magnetismo solar; Nuevos resultados de LIGO+VIRGO con cuatro nuevas detecciones de ondas gravitacionales. En la foto, de arriba a abajo y de izquierda a derecha: Sara Robisco, Carlos González, Carlos Westendorp, Marian Martínez, Héctor Socas. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración entre el Área de Investigación y la Unidad de Comunicación y Cultura Científica (UC3) del Instituto de Astrofísica de Canarias.

Ça Se Passe Là-Haut
#796 : Quatre nouvelles sources d'ondes gravitationnelles identifiées par LIGO/VIRGO

Ça Se Passe Là-Haut

Play Episode Listen Later Dec 4, 2018 10:13


Les collaborations LIGO et VIRGO viennent de publier presque en catimini leur tout premier catalogue de sources gravitationnelles qui contient aujourd'hui 10 fusions de trous noirs et 1 fusion d'étoiles à neutrons : on y découvre notamment 4 nouvelles fusions de trous noirs qui n'avaient pas encore été rendues publiques, avec parmi elles celle qui est la plus lointaine et la plus massive de toutes.

Free Astronomy Public Lectures
Breakthrough! The detection of gravitational waves from a neutron star merger (Free Astronomy Public Lectures)

Free Astronomy Public Lectures

Play Episode Listen Later Nov 25, 2018 54:56


Presented by Assoc. Prof. Tara Murphy on 23 November 2018. On August 17th 2017 the LIGO-Virgo interferometer detected gravitational waves from a neutron star merger in a galaxy 130 million light years away. This was a breakthrough for physics and astronomy. What followed was a frenzy of activity as astronomers around the world worked to detect electromagnetic radiation with conventional telescopes. After this unprecedented effort the event was detected in gamma-rays, x-rays, visible light and radio waves. I will discuss this incredible scientific result and its implications, including: predictions made by Einstein; the production of gold and other heavy elements; and our understanding of black hole formation. I will also give a 'behind the scenes' perspective of how it happened, and discuss the changes in the way we do science in this era of big astronomy.

Lectures and Presentations
Breakthrough! The detection of gravitational waves from a neutron star merger (Free Astronomy Public Lectures)

Lectures and Presentations

Play Episode Listen Later Nov 25, 2018 54:56


Presented by Assoc. Prof. Tara Murphy on 23 November 2018. On August 17th 2017 the LIGO-Virgo interferometer detected gravitational waves from a neutron star merger in a galaxy 130 million light years away. This was a breakthrough for physics and astronomy. What followed was a frenzy of activity as astronomers around the world worked to detect electromagnetic radiation with conventional telescopes. After this unprecedented effort the event was detected in gamma-rays, x-rays, visible light and radio waves. I will discuss this incredible scientific result and its implications, including: predictions made by Einstein; the production of gold and other heavy elements; and our understanding of black hole formation. I will also give a 'behind the scenes' perspective of how it happened, and discuss the changes in the way we do science in this era of big astronomy.

Efervesciencia
Alicia Sintes comenta o descubrimento do ano 2017 [Versión estendida]

Efervesciencia

Play Episode Listen Later Dec 24, 2017 31:21


NOTA 27-12-17: Engadidos os dous minutos finais que lle faltaban ao audio. Para a revista Science o descubrimento mais importante do ano 2017 é a fusión de dúas estrelas de neutróns feita pola colaboración LIGO-Virgo e que foi seguida por 70 observatorios en todo o espectro electromagnético. Comentamos as implicacións de este achado con con José Edelstein e Alicia Sintes, investigadora da Universidade das Illas Baleares e co-directora dun dos grupos que analizan os datos de LIGO-Avanzado.

Efervesciencia
Alicia Sintes comenta o descubrimento do ano 2017 [Versión estendida]

Efervesciencia

Play Episode Listen Later Dec 24, 2017 31:21


NOTA 27-12-17: Engadidos os dous minutos finais que lle faltaban ao audio. Para a revista Science o descubrimento mais importante do ano 2017 é a fusión de dúas estrelas de neutróns feita pola colaboración LIGO-Virgo e que foi seguida por 70 observatorios en todo o espectro electromagnético. Comentamos as implicacións de este achado con con José Edelstein e Alicia Sintes, investigadora da Universidade das Illas Baleares e co-directora dun dos grupos que analizan os datos de LIGO-Avanzado.

Club de Ciencias
CLUB DE CIENCIAS. Los premios Nobel

Club de Ciencias

Play Episode Listen Later Dec 15, 2017 26:05


Otorgan el Premio Nobel de Física a los científicos que detectaron, por primera vez, las ondas gravitacionales. Son Rainer Weiss, investigador del Instituto Tecnológico de Massachusetts, Barry C Barish y Kip S. Thorne, investigadores del Instituto de Tecnología de California, miembros del proyecto LIGO/VIRGO. El descubrimiento, a través del experimento LIGO, ha confirmado lo que ya formuló hace un siglo Albert Einstein en su Teoría de la Relatividad.El Premio Nobel de Química ha sido para Jacques Dubochet, profesor de la Universidad de Lausanne, de Suiza, Joachim Frank, de la Universidad de Columbia de Nueva York, de Estados Unidos, y Richard Henderson, investigador del Laboratorio de Biología Molecular de Cambridge, Reino Unido, por hacer criomicroscopía electronica. La críomicroscopía resuelve el problema de poder observar moléculas biológicas en su entorno natural y sin usar tintes. El microscopio electrónico como tal tiene casi cien años, pero para observar los objetos requiere que estos estén al vacío.El premio Nobel de Fisiología o Medicina ha sido para Jeffrey C. Hall, profesor de la Universidad de Maine, de Estados Unidos, Michael Rosbash, profesor e investigador del Instituto Médico Howard Hughes de la Universidad de Brandeis, Estados Unidos, y Michael W. Young, profesor de la Universidad Rockefeller de New York, de Estados Unidos, por sus descubrimientos de los mecanismos moleculares que controlan el ritmo circadiano o el reloj biológico. También indica la regulación de la expresión genética.El Premio Nobel de Economía ha sido para Richard H. Thaler, de 72 años, profesor de la Universidad de Chicago, por su contribución a la economía del comportamiento, esto es, básicamente la incorporación de la psicología a la ciencias económicas. Imparte clases en la Universidad de Chicago. Sus investigaciones demuestran que las decisiones no siempre obedecen a criterios racionales, sino que también entran en juego variables psicológicas que las desvían de un comportamiento económico racional.La Campaña Internacional para la Abolición de las Armas Nucleares ha recibido el Nobel de la Paz , cuya ceremonia de entrega se ha celebrado en Oslo. Allí, ha llamado a las potencias nucleares a sumarse al tratado para la Prohibición de Armas Nucleares. "¿Será el fin de las armas nucleares, o acaso será nuestro propio final?", se ha preguntado Beatrice Fihn, directora de la ICAN.El Premio Nobel de Literatura es Kazuo Ishiguro, de origen japonés y nacionalidad británica, es autor de novelas como "Los restos del día". Nació en Nagashaki en 1954 y llegó a Londres en 1960 con sus padres y su hermana, para que su padre trabajara para el Gobierno británico. Su padre era investigador científico, un oceanógrafo.Por otra parte, en este programa se entrevista a Alejandro Pérez Pastor, profesor de la Universidad Politécnica de Cartagena, sobre el proyecto Irriman, que ha reducido el consumo de agua en la agricultura un 30 por ciento y un 40 la emisión de CO2.

Historias Cienciacionales: el podcast
T2E15 - Skynet Aún No, Una Nueva Era En La Astronomía Ya

Historias Cienciacionales: el podcast

Play Episode Listen Later Nov 3, 2017 65:10


Semana 15 - Skynet aún no; una nueva era en la astronomía ya / Parece que la nueva era en la astronomía ha llegado, de la mano del evento astronómico GW17082017 (para más señas, dos estrellas de neutrones en colisión). Víctor y Pach comentan esa historia, adicionalmente a un reporte geológico sobre la cuenca del Valle de México, una región donde los terremotos de septiembre en México dejaron pérdidas de vidas y muchos daños: ese reporte podría ayudar a explicar el nivel del riesgo. Finalmente, Axel Becerril visita el podcast de nuevo, esta vez para hablar largo y tendido de inteligencias artificiales, y explicarnos por qué Skynet aún está lejos y podría terminar siendo una brindadora de conocimiento. ¡Acompáñennos! Menú 00:24 – Intro 01:31 – Detección de estrellas de neutrones en colisión con ondas gravitacionales y luz 13:13 – Un mapa de las fallas geológicas en la Ciudad de México 23:05 – ¿Qué tan lejos está Alpha Go Zero de Skynet? 01:03:38 - Despedida y métodos de contacto Créditos musicales completos en nuestra página de Soundcloud. Este podcast es producido desde un lugar no determinado de México, y a veces en un día determinado que terminan siendo dos fechas por problemas técnicos. Número de veces que se menciona a Elon Musk en este episodio: 1. Ligas de interés Más sobre el descubrimiento de las ondas gravitacionales: http://www.bbc.com/mundo/noticias-41637747 Sobre el reporte geológico de la Ciudad de México: http://www.gaceta.unam.mx/20171016/mapea-la-unam-fracturas-en-el-suelo-de-cdmx/ http://www.geociencias.unam.mx/geociencias/desarrollo/fracturas_sismo2017.pdf Sobre Alpha Go Zero: https://www.unocero.com/noticias/ciencia/alphago-zero-un-avance-de-la-inteligencia-artificial-sin-precedente/ https://www.entrepreneur.com/article/303444 El artículo en la revista Nature (en inglés): https://www.nature.com/articles/nature24270.epdf?author_access_token=VJXbVjaSHxFoctQQ4p2k4tRgN0jAjWel9jnR3ZoTv0PVW4gB86EEpGqTRDtpIz-2rmo8-KG06gqVobU5NSCFeHILHcVFUeMsbvwS-lxjqQGg98faovwjxeTUgZAUMnRQ Y el soundtrack de Blade Runner, porque es una joya: https://www.youtube.com/watch?v=k3fz6CC45ok Música y audios Intro y salida: Little Lily Swing, de Tri-Tachyon, bajo una licencia Creative Commons 3.0 de Atribución: http://freemusicarchive.org/music/Tri-Tachyon/ Noticias comentadas: Instar (Instrumental) por Robin Allender que está licenciada bajo una Licencia Attribution-NonCommercial 3.0 International. Tema discutido: Passage of Time (Duet) por Martijn de Boer (NiGiD) (c) 2016 Licenciada bajo una licencia Creative Commons Attribution Noncommercial (3.0): http://dig.ccmixter.org/files/NiGiD/52856 Ft: Doxent Zsigmond Rúbrica: Now son, de Podington Bear, http://freemusicarchive.org/music/Podington_Bear/ Bajo una licencia Creative Commons Internacional de Atribución No Comercial 3.0 Voz en la rúbrica: Valeria Sánchez. Audio 1: Anuncio de la señal de ondas gravitacionales GW17082017, desde el detector VIRGO https://www.youtube.com/watch?v=mtLPKYl4AHs Audio 2: Espectrograma de la señal, desde el canal de LIGO-Virgo: https://www.youtube.com/watch?v=aWX-BY-A9CY Audio 3: Discurso de John Connor en contra Skynet: https://www.youtube.com/watch?v=pS9MNvJZrdk Voz en la rúbrica: Valeria Sánchez.

Scientificast
L'origine dei Gamma Ray Burst - Scientificast #176

Scientificast

Play Episode Listen Later Oct 23, 2017 62:50


Nuova puntata di Scientificast condotta da Paolo e Andrea.Approfondiamo le recenti straordinarie scoperte annunciate il 16 ottobre. Il primo, vero esempio di astronomia multimessaggero, con segnali elettromagnetici e di onde gravitazionali provenienti dalla collisione di due stelle di neutroni distanti 130 milioni di anni luce da noi, che ha visto la collaborazione di oltre 70 gruppi di ricerca, telescopi, interferometri e satelliti e che ha permesso di svelare alcuni misteri del nostro universo, quali l'origine dei lampi di luce gamma brevi, delle kilonove e della sintesi di elementi pesanti. Ne abbiamo parlato qui: https://www.scientificast.it/2017/10/16/lorigine-dei-gamma-ray-burst-veloci-altro/Ne parliamo in podcast con Elena Cuoco, fisica e data scientist presso EGO (European Gravitational Observatory), che lavora per la collaborazione LIGO-Virgo ed è coordinatrice scientifica del progetto GraWIToN.In studio discutiamo di sicurezza informatica. Che cosa c'è alla base di questo concetto? Basta una password non banale per sentirsi sicuri? Non proprio. Abbiamo protocolli di criptazione e decriptazione di informazioni sempre più complessi e chiavi sempre più impenetrabili ma come si dice spesso, il problema sta tra lo schermo del computer e la sedia.Immagine di copertina: ShutterstockIn studio: Paolo Bianchi, Andrea BersaniMontaggio: Paolo BianchiServizi di: Daniele MolaroOspiti: Elena CuocoMusiche di: Lucio Disarò, Daniele detto “Giuliano Ferrara”.

Priority One: A Roddenberry Star Trek Podcast
339 - Batteries Not Included | Priority One: A Roddenberry Star Trek Podcast

Priority One: A Roddenberry Star Trek Podcast

Play Episode Listen Later Oct 19, 2017 56:14


This week, we’re Trekking Out what could be Nvidia’s answer to the Holodeck, what scientists are doing to try and design a real-life deflector shield, and where you can see some great cast reunion pics from Deep Space Nine. In Star Trek Online news, there’s new content available on Xbox One and Playstation 4, and we’re getting excited over the new Miracle Worker ship mega-bundle. Later, our science adviser Dr Robert Hurt is here talking about the EPIC new discovery of gravitational waves, and finally we’ll be jumping on THAT F-bomb and more, in our review of the latest episode of Star Trek Discovery. And as always, before we wrap up the show, we’ll open hailing frequencies for your incoming messages. TOPICS DISCUSSED Trek It Out Nvidia Holodeck William Shatner appearing on the Star Trek Tour 2018 Real-life deflector shields DS9 photoshoot for 'Variety' Star Trek Online and Gaming News Beyond the Nexus now available on console Champion of Sompek event for console Free Discovery uniforms and Type 7 shuttle on console Miracle Worker Mega Bundle Winters's Top Tip Transferring energy credits between characters Astrometrics Report LIGO video from Caltech LIGO press release NASA press release LIGO/Virgo gravitational wave news panel (part 1, part 2) On Screen "Choose Your Pain" COMMUNITY QUESTIONS When was the last time you bought a new ship in Star Trek Online? And will the new Miracle Worker ships convince you to buy again? BE SURE TO VISIT OUR YOUTUBE CHANNEL AND SUBSCRIBE TO THE PREMIER STAR TREK ONLINE PODCAST! Priority One Productions is always looking for new team members that have a passion for Star Trek. Please know that all of our positions are volunteer, but we do offer a well-known outlet for your work. If you have a skill that you believe could enhance our content, then send your contact information and experience along with a few writing samples to INCOMING@PRIORITYONEPODCAST.COM Did you miss any of our great Blogs last week? Stop by THIS LINK and see for yourself! How about our latest Video Release? You can also follow us on the social media sites! We’re on Facebook! Head over to WWW.FACEBOOK.COM/PRIORITYONEPODCAST and say, “Hi!” Or, Check us out on Twitter via @PRIORITYONEPOD for show times and other cool stuff. Liked this episode? Totally hated it? Leave a comment below or CONTACT US via our handy web form! Enjoy the show! Winters’s Top Tip is underscored by: Hero Down Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/

The Roddenberry Podcast Network
P1P: 339 - Batteries Not Included | Priority One: A Roddenberry Star Trek Podcast

The Roddenberry Podcast Network

Play Episode Listen Later Oct 19, 2017 56:14


This week, we're Trekking Out what could be Nvidia's answer to the Holodeck, what scientists are doing to try and design a real-life deflector shield, and where you can see some great cast reunion pics from Deep Space Nine. In Star Trek Online news, there's new content available on Xbox One and Playstation 4, and we're getting excited over the new Miracle Worker ship mega-bundle. Later, our science adviser Dr Robert Hurt is here talking about the EPIC new discovery of gravitational waves, and finally we'll be jumping on THAT F-bomb and more, in our review of the latest episode of Star Trek Discovery. And as always, before we wrap up the show, we'll open hailing frequencies for your incoming messages. TOPICS DISCUSSED Trek It Out Nvidia Holodeck William Shatner appearing on the Star Trek Tour 2018 Real-life deflector shields DS9 photoshoot for 'Variety' Star Trek Online and Gaming News Beyond the Nexus now available on console Champion of Sompek event for console Free Discovery uniforms and Type 7 shuttle on console Miracle Worker Mega Bundle Winters's Top Tip Transferring energy credits between characters Astrometrics Report LIGO video from Caltech LIGO press release NASA press release LIGO/Virgo gravitational wave news panel (part 1, part 2) On Screen "Choose Your Pain" COMMUNITY QUESTIONS When was the last time you bought a new ship in Star Trek Online? And will the new Miracle Worker ships convince you to buy again? BE SURE TO VISIT OUR YOUTUBE CHANNEL AND SUBSCRIBE TO THE PREMIER STAR TREK ONLINE PODCAST! Priority One Productions is always looking for new team members that have a passion for Star Trek. Please know that all of our positions are volunteer, but we do offer a well-known outlet for your work. If you have a skill that you believe could enhance our content, then send your contact information and experience along with a few writing samples to INCOMING@PRIORITYONEPODCAST.COM Did you miss any of our great Blogs last week? Stop by THIS LINK and see for yourself! How about our latest Video Release? You can also follow us on the social media sites! We're on Facebook! Head over to WWW.FACEBOOK.COM/PRIORITYONEPODCAST and say, “Hi!” Or, Check us out on Twitter via @PRIORITYONEPOD for show times and other cool stuff. Liked this episode? Totally hated it? Leave a comment below or CONTACT US via our handy web form! Enjoy the show! Winters's Top Tip is underscored by: Hero Down Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/

The Big Beard Theory
133: Смена планов Маска, проблемы лунной станции и звук Большого Взрыва

The Big Beard Theory

Play Episode Listen Later Oct 5, 2017 42:49


Нагоняем главные события последних недель вроде вручения Нобелевской премии и Международного Астронавтического Конгресса. Ведущий: Антон Поздняков Темы выпуска [00:00:33] ⋅⋅⋅ Приветствие. BeardyCast 128 — Рынок труда с Андреем Себрантом и iPad Pro с Борисом Веденским [00:02:38] ⋅⋅⋅ Нобелевская премия 2017. [00:05:05] ⋅⋅⋅ Очередное обнаржуение гравитационных волн от детекторов LIGO и VIRGO. The Big Beard Theory 130 — Важнейшее астрофизическое открытие года и смерть миссии Cassini. [00:08:37] ⋅⋅⋅ Илон Маск и его Big F*cking Rocket. [00:22:32] ⋅⋅⋅ Deep Space Gateway и проблемы окололунной станции. [00:28:01] ⋅⋅⋅ Ответы на вопросы слушателей. [00:28:31] ⋅⋅⋅ Световые компьютеры — электроника на фотонах вместо электронов. [00:33:45] ⋅⋅⋅ Как измеряют расстояния до далеких галактик. [00:36:10] ⋅⋅⋅ Был ли звук от Большого Взрыва. [00:38:02] ⋅⋅⋅ Есть ли «верх» у Земли. [00:39:14] ⋅⋅⋅ Почему другие галактики могут быть так далеко. [00:40:35] ⋅⋅⋅ Прощание. Поддержи Бородокаст Patreon Контакты:

rocket ipad pro cassini big f ligo virgo deep space gateway beardycast big beard theory
Coffee Break: Señal y Ruido
Ep131: Los NOBEL; Rumores: TMT y LIGO/VIRGO; Sueños de Medusas

Coffee Break: Señal y Ruido

Play Episode Listen Later Oct 5, 2017 127:27


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Desmontando mitos sobre la Estrella de Tabby; Analizamos los Premios Nobel de Ciencia 2017; Rumores sobre el Supertelescopio TMT; Confirmado: LIGO/VIRGO convoca un anuncio para el 16-Oct; Las medusas, el ser más simple que duerme. En la foto, de arriba a abajo y de izquierda a derecha: Héctor Socas, Alberto Aparici, Carlos González, Carlos Westendorp. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración entre el Área de Investigación y la Unidad de Comunicación y Cultura Científica (UC3) del Instituto de Astrofísica de Canarias.

Coffee Break: Señal y Ruido
Ep131: Los NOBEL; Rumores: TMT y LIGO/VIRGO; Sueños de Medusas

Coffee Break: Señal y Ruido

Play Episode Listen Later Oct 5, 2017 127:27


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Desmontando mitos sobre la Estrella de Tabby; Analizamos los Premios Nobel de Ciencia 2017; Rumores sobre el Supertelescopio TMT; Confirmado: LIGO/VIRGO convoca un anuncio para el 16-Oct; Las medusas, el ser más simple que duerme. En la foto, de arriba a abajo y de izquierda a derecha: Héctor Socas, Alberto Aparici, Carlos González, Carlos Westendorp. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración entre el Área de Investigación y la Unidad de Comunicación y Cultura Científica (UC3) del Instituto de Astrofísica de Canarias.

Astronomy News
The news - October 2017

Astronomy News

Play Episode Listen Later Oct 3, 2017 6:43


This month in the news: LIGO-VIRGO and Arecibo Observatory

Coffee Break: Señal y Ruido
Ep130: LIGO+VIRGO; Alimentación; Farmaciencia vs Homeopatía; Huracanes y conspiranoias; Asteroide-cometa doble

Coffee Break: Señal y Ruido

Play Episode Listen Later Sep 29, 2017 164:42


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Primera detección de ondas gravitacionales de la colaboración LIGO+VIRGO; Resultados de un macroestudio sobre alimentación y salud; Farmaciencia y su lucha contra el engaño en las farmacias; Cuentas de servilleta sobre huracanes y paranoias. En la foto, de arriba a abajo y de izquierda a derecha: Bernabé Cedrés, Itahisa Marcelino, Vary Bayón, Héctor Socas, Julio Castro, Héctor Vives. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración entre el Área de Investigación y la Unidad de Comunicación y Cultura Científica (UC3) del Instituto de Astrofísica de Canarias.

Coffee Break: Señal y Ruido
Ep130: LIGO+VIRGO; Alimentación; Farmaciencia vs Homeopatía; Huracanes y conspiranoias; Asteroide-cometa doble

Coffee Break: Señal y Ruido

Play Episode Listen Later Sep 29, 2017 164:42


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Primera detección de ondas gravitacionales de la colaboración LIGO+VIRGO; Resultados de un macroestudio sobre alimentación y salud; Farmaciencia y su lucha contra el engaño en las farmacias; Cuentas de servilleta sobre huracanes y paranoias. En la foto, de arriba a abajo y de izquierda a derecha: Bernabé Cedrés, Itahisa Marcelino, Vary Bayón, Héctor Socas, Julio Castro, Héctor Vives. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración entre el Área de Investigación y la Unidad de Comunicación y Cultura Científica (UC3) del Instituto de Astrofísica de Canarias.

Le oche
Le Oche - Nuovi frumenti dall'Etiopia

Le oche

Play Episode Listen Later Sep 28, 2017 48:28


Apriamo la trasmissione con il prof. Carlo Bradaschia dell'INFN di Pisa. Abbiamo saputo che l'interferometro Virgo ha ufficialmente rilevato la sua prima onda gravitazionale, la quarta della collaborazione Ligo-Virgo. Oltre a fargli i complimeti gli chiediamo com'è andata. - Matteo Dell'Acqua è un giovane post-doc all'Istituto di Scienze della Vita diretto da Mario Enrico Pè alla Scuola Superiore Sant'Anna. A fine luglio insieme ad altri colleghi del Sant'Anna, dell'Università di Bologna, dell'Università di Makelle e con la partecipazione di 90 contadini etiopi, ha portato avanti e pubblicato un lavoro gigantesco di selezione partecipativa delle sementi più adatte all'ecosistema in un clima che cambia. Proviamo a farci raccontare qualcosa in più.

Le oche
Le Oche - Nuovi frumenti dall'Etiopia

Le oche

Play Episode Listen Later Sep 28, 2017 48:28


Apriamo la trasmissione con il prof. Carlo Bradaschia dell'INFN di Pisa. Abbiamo saputo che l'interferometro Virgo ha ufficialmente rilevato la sua prima onda gravitazionale, la quarta della collaborazione Ligo-Virgo. Oltre a fargli i complimeti gli chiediamo com'è andata. - Matteo Dell'Acqua è un giovane post-doc all'Istituto di Scienze della Vita diretto da Mario Enrico Pè alla Scuola Superiore Sant'Anna. A fine luglio insieme ad altri colleghi del Sant'Anna, dell'Università di Bologna, dell'Università di Makelle e con la partecipazione di 90 contadini etiopi, ha portato avanti e pubblicato un lavoro gigantesco di selezione partecipativa delle sementi più adatte all'ecosistema in un clima che cambia. Proviamo a farci raccontare qualcosa in più.

Coffee Break: Señal y Ruido
Ep125: Agujeros Negros Primordiales y Materia Oscura; Nuevo Rumor LIGO; Eclipse Total; ¿Es el Big Bang un Agujero Negro?

Coffee Break: Señal y Ruido

Play Episode Listen Later Aug 24, 2017 121:21


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: ¿Podría la materia oscura estar hecha de agujeros negros de masa intermedia?; Analizamos el rumor sobre un gran descubrimiento de la colaboración LIGO/VIRGO; La experiencia de un eclipse solar total; ¿Es el Big Bang análogo a un agujero negro? En la foto, de arriba a abajo y de izquierda a derecha: Alberto Aparici, Nayra Rodríguez, Héctor Socas, Héctor Vives. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración entre el Área de Investigación y la Unidad de Comunicación y Cultura Científica (UC3) del Instituto de Astrofísica de Canarias.

Coffee Break: Señal y Ruido
Ep125: Agujeros Negros Primordiales y Materia Oscura; Nuevo Rumor LIGO; Eclipse Total; ¿Es el Big Bang un Agujero Negro?

Coffee Break: Señal y Ruido

Play Episode Listen Later Aug 24, 2017 121:21


La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: ¿Podría la materia oscura estar hecha de agujeros negros de masa intermedia?; Analizamos el rumor sobre un gran descubrimiento de la colaboración LIGO/VIRGO; La experiencia de un eclipse solar total; ¿Es el Big Bang análogo a un agujero negro? En la foto, de arriba a abajo y de izquierda a derecha: Alberto Aparici, Nayra Rodríguez, Héctor Socas, Héctor Vives. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración entre el Área de Investigación y la Unidad de Comunicación y Cultura Científica (UC3) del Instituto de Astrofísica de Canarias.