Podcasts about nanograv

Shoot, someone made the mistake of letting Cole pick the episode topic. In this episode, Cole, Cormac, and Shashank talk about the big boy on cosmology campus: Lambda CDM. This model has gotten a bit too big for its britches we think: what are the things about the universe that this model can't explain? Shashank gives us a tour through the dark matter hearts of galaxies which don't match up with cosmological predictions and Cormac shows us how 1500 (ish? We're not clear on this one.) supernovae could hint at a fundamental flaw in Lambda CDM.   Astrobites: Testing cosmology with the DES 5-year supernovae dataset: https://astrobites.org/2024/03/22/template-post-21/   Digging into the Core: Dark Matter and Dwarf Galaxies https://astrobites.org/2015/07/14/digging-into-the-core-dark-matter-and-dwarf-galaxies/   Space Sound: Listen to the hum of NANOGrav's gravitational wave background https://www.youtube.com/watch?v=nGO0wQK9ns4

Mi primer manual de los buenos modales, el experimento Nanograv con Roberto Pascua, Berlín con David Alonso y The Producers con Armando Pita.

Denne gang skal vi nørde igennem med gravitationsbølger – bittesmå fluktuationer i selve rumtiden. Gravitationsbølger blev forudsagt af Albert Einstein i den generelle relativitetsteori, og selvom de i princippet opstår hver gang objekter bevæger sig i forhold til andre objekter, så er det først når der er store og ekstremt massive objekter involveret, at bølgerne bliver store nok til at vi kan måle dem – som fx når to sorte huller kolliderer. Men selv når sorte huller støder sammen er gravitationsbølgerne stadig meget, meget, meget små. Og derfor skal vi også helt op til 2015, før det første gang lykkedes at detektere gravitationsbølger med LIGO - Laser Interferometer Gravitational-Wave Observatory. TIl at fortælle mere om gravitationsbølger får vi besøg af professor Thomas Tauris fra Aalborg Universitet, der i mange år har arbejdet med kompakte objekter som neutronstjerner og sorte huller. Inden da skal vi selvfølgelig også have et par aktuelle nyheder – denne gang om Månebiler, is på Euclid og en exomåne som er opdaget af James Webb Space Telescope. Lyt med

Last year, an experiment called NanoGRAV made a surprising discovery of gravitational waves using pulsars around the universe. Special guest Chiara Mingarelli explains. For ad free episodes and other exclusives, join us for just $3 a month on Patreon: https://patreon.com/whythisuniverse Our merch is available here: https://www.shalmawegsman.com/why-this-universe

Stephen Wolfram answers questions from his viewers about the history science and technology as part of an unscripted livestream series, also available on YouTube here: https://wolfr.am/youtube-sw-qa Questions include: Can you comment on the future of LLMs being running in the cloud vs. being run on one's local machine? - Does the NANOGrav discovery spark ideas for experimental validation of the Physics Project? - Can you discuss the next evolution for AI models? So far we have: language models, image – text (classifiers), text – image (generators), etc. - What can be said for training multimodal AI models? - Do you think that we have reached a point of singularity such that any child born from today onward will never be able to surpass AI at any intellectual task, i.e. are we the last "useful" generation? - Is VR the future of UIs? - Given the two contrasting scenarios of a "Pink Plasma Heaven," where artificial general intelligence optimally solves problems for all sentient life, and a "Matrix Hell," where AI exploits humans as energy sources, how can we establish a guiding framework to navigate between these extremes? - To what degree do you think LLMs provide us with insights on the internal workings of our brain? Do you think there will be more lessons to learn from the structure of the human brain when designing the next generation of LLMs? - Does the spread of LLMs incentivize scientists (and humans in general) to become more deeply specialized (to "out-compete" LLMs in a narrow domain) or to become more broadly spread (in order to creatively generate connections between apparently remote domains)? - Will it be possible to use LLMs to achieve world peace? Or if world peace isn't big enough, can we beam LLM chats into outer space to try and get universal peace? - What do you think of power laws? What do you think are some good entry points for explaining the principles behind power laws? - What do you think of the future of AI in video games? They can be used to control the actions and dialog of NPCs, the design of the game's world and even the design of assets on the fly using little data. Video game assets can take up a lot of data, and if we could use AI to generate assets on the fly using a smaller amount of data, we could cut down on the download size of games as well as the effort needed to make assets. - How will we be able, in the future, to tell what we're seeing on screen isn't AI generated? Anything we could do today? (I think you might be a bot.) - Thinking in terms of inter-concept space, do you think there is an approach to using technology to develop a way in which we may better understand or gain experience to bridge the gap of inter-concept space between what we know and what we don't know? - When will this statement, "I think you might be a bot", be a compliment, rather than a criticism or an insult?

Join with me today as we learn about the secrets of gargantuan gravitational waves, and the ingenious new method astronomers have used to detect them.Welcome to the Astrum Sleep Space podcast; the perfect place to come and wind down for the evening while you learn more about the grandeur of the universe. I'm Alex McColgan, the founder of the Astrum brand, and your host on this podcast. Come and listen as I tell you about incredible missions, fascinating discoveries, and everything I've come to love about space.If you like what you're listening to, be sure to check out my YouTube channel at www.youtube.com/@astrumspace for more great space content.

La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy:Cara B:ESPECIAL PREMIOS SEÑAL Y RUIDO 2023-Nanogravitondas con NANOGrav, EPTA, PTA y CPTA (ep422): (04:48)-Beneficios de las terapias GLP-1 contra la obesidad (ep446): (35:48)Candidaturas Premio Ruido (50:48)-El supuesto superconductor a condiciones ambientales LK-99 (ep423) (51:48)-Las microesférulas de Loeb (ep439) (1:05:27)-Grush testifica sobre OVNIs ante el congreso de EEUU (ep423) (1:31:08)Este episodio es continuación de la Cara A.Contertulios: Isabel Cordero, José Edelstein, Alberto Aparici, 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.

Recorded live 29 June 2023. Gravitational waves play a cosmic symphony as they pass through our galaxy. This week, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) Physics Frontiers Center released the results of 15 years of data in a set of papers published in The Astrophysical Journal Letters. This research is the first evidence of gravitational waves at very low frequencies.   The team, comprised of 190 scientists, transformed our region of the Milky Way Galaxy into an immense gravitational-wave antenna using pulsars. NANOGrav's endeavor involved collecting data from 68 pulsars, fashioning a pulsar timing array—a distinctive type of detector.   In 2020, with over a decade of data, NANOGrav scientists detected hints of an additional enigmatic "hum" in the timing behavior of all the pulsars in their array. After exploring alternative explanations, they grew confident in the authenticity of this signal. Its detection became increasingly feasible with more extensive observations.    However, at that stage, the gravitational-wave signature predicted by general relativity remained too faint to emerge. After fifteen years of pulsar observations, the evidence of gravitational waves, with periods spanning years to decades, emerges prominently.   Join Simon Steel, Deputy Director of the Carl Sagan Center, as he discusses this groundbreaking research with NANOGrav team member and SETI Institute researcher Dr. Michael Lam. Press release: https://www.seti.org/press-release/nanogravs-15-year-journey-reveals-cosmic-hum   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.

Han hecho falta 15 años de recogida de datos para que investigadores de todo el mundo hayan podido confirmar la existencia del fondo estocástico de ondas gravitacionales: una vibración espacio-temporal que nos atraviesa constantemente y cuyo estudio ofrecerá más detalles sobre la formación de las galaxias y, tal vez, una nueva vía para conocer cómo fueron los primeros instantes del universo, justo después del Big Bang. Los científicos han podido confirmar la existencia de este "eco" estudiando levísimas fluctuaciones detectadas en la observación de decenas de púlsares. Nos lo cuenta José Juan Blanco-Pillado, investigador Ikerbasque y miembro asociado de NANOGrav.

This week on The Cosmic Companion, we take on a weighty subject — gravity. Later in the show, we are going to talk with Joe Swiggum from the NanoGrav Collaboration.Gravity is one of those things that we all know about, but when you really stop to think about it, it's pretty mind-boggling. I mean, there's this invisible force that keeps us all stuck to the ground and makes things fall when we drop them. How wild is that? Get full access to The Cosmic Companion w/ James Maynard at thecosmiccompanion.substack.com/subscribe

Gravitational waves play a cosmic symphony as they pass through our galaxy. This week, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) Physics Frontiers Center released the results of 15 years of data in a set of papers published in The Astrophysical Journal Letters. This research is the first evidence of gravitational waves at very low frequencies. The team, comprised of 190 scientists, transformed our region of the Milky Way Galaxy into an immense gravitational-wave antenna using pulsars. NANOGrav's endeavor involved collecting data from 68 pulsars, fashioning a pulsar timing array—a distinctive type of detector. In 2020, with over a decade of data, NANOGrav scientists detected hints of an additional enigmatic "hum" in the timing behavior of all the pulsars in their array. After exploring alternative explanations, they grew confident in the authenticity of this signal. Its detection became increasingly feasible with more extensive observations. However, at that stage, the gravitational-wave signature predicted by general relativity remained too faint to emerge. After fifteen years of pulsar observations, the evidence of gravitational waves, with periods spanning years to decades, emerges prominently. Join Simon Steel, Deputy Director of the Carl Sagan Center, as he discusses this groundbreaking research with NANOGrav team member and SETI Institute researcher Dr. Michael Lam. Press release: https://www.seti.org/press-release/nanogravs-15-year-journey-reveals-cosmic-hum Recorded live 29 June 2023

Een nieuwe #nerdland podcast! Zwaartekrachtsgolven met NANOGrav! Doom met rattenhersenen! Pompeïpizza! Anthropoceen! Lego JWST! De Tespla! Steekvliegen! Batterijriem! Oppenheimer! En veel meer... Shownotes: https://maandoverzicht.nerdland.be/nerdland-maandoverzicht-augustus-2023/ Gepresenteerd door Lieven Scheire met Jeroen Baert, Kurt Beheydt, Dufie Strubbe, Bart Van Peer en Peter Berx. Opname en montage door Els Aerts & Jens Paeyeneers. (00:00:00) Intro (00:10:55) Rattenhersenen leren Doom spelen (00:21:07) James Webb in LEGO (00:27:23) Mannelijke kever zonder dekschilden ontdekt (00:39:04) Hersenmitochondrieën (00:49:32) Space Shuttle in California Science Center rechtop (00:53:28) Canadees meer gekozen als referentie voor Antropoceen (01:04:11) Protopizza in Pompei (01:07:48) Zwaartekrachtsgolven NanoGRAV (01:21:43) SILICON VALLEY NEWS (01:21:52) ViaSat satelliet antenne kapot (01:31:10) Eerste Cybertruck rolt van band (01:33:25) xAI (01:35:13) Threads gelanceerd (01:45:54) Eerste commerciële vlucht Virgin Galactic (01:48:19) Chimeramieren rechtzetting (01:52:51) Oppenheimer review (02:07:06) Steekvliegen worden aangetrokken tot blauw (02:15:20) RoboCup nabeschouwing en vooruitblik 2024 (02:19:39) Playstation toegankelijkheidscontroller (02:24:39) RECALLS (02:24:45) Uitspraken blunders (02:28:23) Belty (02:34:10) Hetty Chemie boek (02:34:38) Nerdland voor Kleine Nerds 27 december in Lotto Arena (02:35:04) Lieven AI tournee (02:35:16) Hetty Missie 2023 tournee (02:35:34) Lezingen Jeroen (02:36:25) Sponsor Fairy Positron

Ruth Grützbauch ist Astronomin, betreibt in Wien ein Popup-Planetarium, und ich lasse mir von ihr oarges Zeug aus dem Universum erzählen. Darin: Gravitationswellen (-Hintergrund), Pulsar timing array, NANOGrav, Laser Interferometer Space Antenna, Neutrino-Abbildung der Milchstraße, Neutrinos, IceCube, Tscherenkow-Strahlung Odonien 23 am 21. August 2023. Auch hörenswert: RES095 Die PTB und die neuen Einheiten

Ruth Grützbauch ist Astronomin, betreibt in Wien ein Popup-Planetarium, und ich lasse mir von ihr oarges Zeug aus dem Universum erzählen. Darin: Gravitationswellen (-Hintergrund), Pulsar timing array, NANOGrav, Laser Interferometer Space Antenna, Neutrino-Abbildung der Milchstraße, Neutrinos, IceCube, Tscherenkow-Strahlung Odonien 23 am 21. August 2023. Auch hörenswert: RES095 Die PTB und die neuen Einheiten

There's been some huge news in the world of cosmology: for the first time scientists have detected a low frequency hum of gravitational waves. The new results were published by the North American Nanohertz Observatory for Gravitational Waves, NANOGrav for short. The NANOGrav team were not alone — they coordinated with collaborations in Europe, India, Australia, and China, which released similar findings at the same time. In this podcast we find out what these new results mean, and why they're so exciting, with Michalis Agathos, Amelia Drew, and Ulrich Sperhake of the Stephen Hawking Centre for Theoretical Cosmology at the University of Cambridge. Join us on this fascinating, and slightly mind-bending, cosmic ride! To find out more about the topics discussed in this podcast see: Maths in a minute: Gravitational waves Maths in a minute: Black holes Maths in a minute: Einstein's general theory of relativity You might also want to listen to our recent podcast A new map of dark matter. The illustration above is an artist's rendering of black hole binaries emitting gravitational waves, produced by Olena Shmahalo for NANOGrav and reproduced here under CC BY 4.0.

Scientists say that, for the first time, they have observed gravitational waves caused by black holes and other huge space objects moving through the universe. A group of international scientists using radio telescopes in North America, Europe, China, India and Australia made the observation. The existence of gravitational waves was first predicted more than 100 years ago by physicist Albert Einstein as part of his General Theory of Relativity. Einstein's theory proposed that gravity is caused by a curving of space and time.科学家表示，他们首次观测到黑洞和其他巨大太空物体在宇宙中移动引起的引力波。一组国际科学家使用北美、欧洲、中国、印度和澳大利亚的射电望远镜进行了观测。一百多年前，物理学家阿尔伯特·爱因斯坦在其广义相对论中首次预言了引力波的存在。 爱因斯坦的理论提出，引力是由空间和时间的弯曲引起的。Scientists believe that, as gravitational waves travel through space, they press against and stretch everything they pass through. But researchers have struggled for many years to find solid evidence of the waves. In the 1970s, researchers found indirect proof by studying the motion of two crashing stars. That work was honored as part of the 1993 Nobel Prize in physics. Then, in 2016, astronomers announced they had detected the first direct evidence of gravitational waves. That evidence came from an American-based research project known as the Laser Interferometer Gravitational-Wave Observatory, or LIGO. The LIGO project used ground-based telescope instruments to detect a gravitational wave produced when two black holes crashed into each other about 1.3 billion light years from Earth.科学家认为，当引力波穿过太空时，它们会挤压并拉伸所经过的所有物体。 但研究人员多年来一直在努力寻找海浪确实存在的证据。 20 世纪 70 年代，研究人员通过研究两颗碰撞恒星的运动找到了间接证据。 这项工作被授予 1993 年诺贝尔物理学奖。然后，在 2016 年，天文学家宣布他们发现了引力波的第一个直接证据。 这些证据来自一个名为激光干涉仪引力波天文台（LIGO）的美国研究项目。 LIGO 项目使用地面望远镜仪器来探测距离地球约 13 亿光年的两个黑洞相互碰撞时产生的引力波。But the LIGO effort was only able to pick up waves at high frequencies. In the latest research, scientists were attempting to find low-frequency waves as a way to confirm gravitational wave signals.↳ The researchers said they successfully discovered such signals using about 15 years of data from a project called NANOGrav. This project has long used telescopes across North America to search for low-frequency gravitational waves. The results were recently published in a study in The Astrophysical Journal of Letters.但 LIGO 的努力只能拾取高频波。 在最新的研究中，科学家们试图寻找低频波来确认引力波信号。研究人员表示，他们利用 NANOGrav 项目约 15 年的数据成功发现了此类信号。 该项目长期以来一直使用北美各地的望远镜来寻找低频引力波。 该结果最近发表在《天体物理学文学杂志》的一项研究中。The research involved scientists aiming a series of radio telescopes at dead stars called pulsars. The pulsars send out radio wave signals as they spin around in space. These signals are so predictable that scientists know exactly when the radio waves are supposed to arrive on Earth. The pulsars are like “a perfectly regular clock ticking away far out in space,” said NANOGrav member Sarah Vigeland. She is an astrophysicist at the University of Wisconsin-Milwaukee. But gravitational waves can affect the distance between Earth and the pulsars, which can change the signal activity.这项研究涉及科学家将一系列射电望远镜瞄准称为脉冲星的死亡恒星。脉冲星在太空中旋转时发出无线电波信号。这些信号是如此可预测，以至于科学家们确切地知道无线电波何时到达地球。 NANOGrav 成员莎拉·维格兰 (Sarah Vigeland) 表示，脉冲星就像“一个在遥远的太空中滴答作响的完全规则的时钟”。她是威斯康星大学密尔沃基分校的天体物理学家。但引力波会影响地球和脉冲星之间的距离，从而改变信号活动。

Die Kollaboration NANOGrav hat ihre Auswertung zu 15 Jahren Daten über sogenannte Pulsar Timing Arrays veröffentlich und tatsächlich so Gravitationswellen gemessen. Zusätzlich können sie auch neue Physik wie die Stringtheorie damit überprüfen. Wie immer überall, wo es Podcasts gibt. Viel Vergnügen! #nanograv #gravitationswellen #stringtheorie #einstein #pulsare #standardkerzen #kosmologie ********** Anmerkungen, Fragen, Kritik oder interessante Themenvorschläge bitte an physikgeplaenkel@gmail.com ********** Unsere Instragram Seite: https://www.instagram.com/physikgeplaenkel/ Unsere Facebook Seite: https://www.facebook.com/Physik-Geplänkel-1153934681433003/ Unser Youtube Channel: https://www.youtube.com/channel/UCD1CT-nTdEagwMF16P6gIKQ/ Folgt uns unter "Physik-Geplänkel" auf Spotify, iTunes, Deezer, PocketCasts oder als Amazon Alexa Skill. Oder am besten direkt unter https://physik-geplaenkel.podigee.io/

Las ondas gravitacionales han supuesto una nueva ventana para la astronomía y la cosmología, que no deja de asombraros. Investigadores del Observatorio de Nanohercios de Ondas Gravitacionales de América del Norte (NANOGrav) han detectado un fondo cósmico de ondas gravitacionales asociadas a los eventos más violentos del cosmos. Hemos entrevistado a Xavier Siemens, codirector de NANOGrav y astrofísico de la Universidad de Oregón. Con Alba Calejero hemos profundizado en el objetivo de la misión europea Euclid (lanzada el pasado 1 de julio) y la participación española. Con testimonios de Francisco Castander, investigador del Instituto de Ciencias del Espacio y del Instituto de Estudios Espaciales de Cataluña; y de Santiago Serrano, ingeniero del Instituto de Ciencias del Espacio. Con Fernando de Castro hemos analizado las informaciones recientemente publicadas sobre el homúnculo de Penfield, un mapa que sitúa en el cerebro cada órgano y sentido del cuerpo, dibujado en la década de 1930 por el neurocirujano estadounidense y discípulo de Cajal, Wilder Penfield. Jesús Martínez Frías nos ha hablado de los indicios de vulcanismo reciente detectados en el planeta Venus. Fernando Blasco nos ha contado el descubrimiento por un equipo de matemáticos estadunidenses de un polígono de 13 lados que tesela el plano con un patrón que nunca se repite. Escuchar audio

El murmullo del espacio-tiempo ha sido escuchado. ¿Estamos seguros? En este programa hablaremos de los recientes y emocionantes descubrimientos de NANOGrav y su relación con el fondo estocástico de ondas gravitacionales. Por otro lado explicaremos la misión del telescopio espacial Euclides de la Agencia Espacial Europea (ESA), del que esperemos que arroje luz sobre los misterios de la materia y la energía oscura. Con la tripulación al completo: Víctor R. Ruiz (Infoastro), Víctor Manchado (Pirulo Cósmico), Carlos Pazos (Mola Saber) y Daniel Marín (Eureka). Todo listo, ¡despegamos!

Las ondas gravitacionales han supuesto una nueva ventana para la astronomía y la cosmología, que no deja de asombraros. Investigadores del Observatorio de Nanohercios de Ondas Gravitacionales de América del Norte (NANOGrav) han detectado un fondo cósmico de ondas gravitacionales asociadas a los eventos más violentos del cosmos. Hemos entrevistado a Xavier Siemens, codirector de NANOGrav y astrofísico de la Universidad de Oregón. Con Alba Calejero hemos profundizado en el objetivo de la misión europea Euclid (lanzada el pasado 1 de julio) y la participación española. Con testimonios de Francisco Castander, investigador del Instituto de Ciencias del Espacio y del Instituto de Estudios Espaciales de Cataluña; y de Santiago Serrano, ingeniero del Instituto de Ciencias del Espacio. Con Fernando de Castro hemos analizado las informaciones recientemente publicadas sobre el homúnculo de Penfield, un mapa que sitúa en el cerebro cada órgano y sentido del cuerpo, dibujado en la década de 1930 por el neurocirujano estadounidense y discípulo de Cajal, Wilder Penfield. Jesús Martínez Frías nos ha hablado de los indicios de vulcanismo reciente detectados en el planeta Venus. Fernando Blasco nos ha contado el descubrimiento por un equipo de matemáticos estadunidenses de un polígono de 13 lados que tesela el plano con un patrón que nunca se repite. Escuchar audio

Hemos escuchado el murmullo de la gravedad. Bueno, dicho así, podría resultar algo extraño y poco entendible. Incluso suena poético: el murmullo de la gravedad. Pero esta historia, la del murmullo, tiene poco más de cien años. Inició cuando Albert Einstein publicó, en 1916, el primer trabajo que describía una extraña propiedad, de un extraño nuevo concepto, de unos aún más extraños objetos que eran simplemente inimaginables. Esos objetos son los agujeros negros, el extraño concepto es el espacio-tiempo y su extraña propiedad es que se deforma. Poniendo todo junto: Einstein fue el primero en imaginar que los movimientos de los agujeros negros eran tan poderosos que deformaban el espacio-tiempo a su alrededor. Y existen tantos y tantos agujeros negros en el Universo, que se pensaba que debía existir una especia de sinfonía cósmica producto de sus emisiones de ondas gravitacionales. Y hoy, todo indica que así es: se ha confirmado. Mi nombre es Vicente Hernández y Hoy en el Cosmos quiero platicarles sobre la detección del fondo cósmico de ondas gravitacionales, generado, muy posiblemente por los pares de agujeros negros más bestiales que conocemos y que abre un enorme y nuevo panorama en nuestro conocimiento del origen del Universo, del origen y evolución de las galaxias y por supuesto de los agujeros negros. Referencias: https://iopscience.iop.org/collections/apjl-230623-245-Focus-on-NANOGrav-15-year https://nanograv.org/news/15yrRelease https://news.berkeley.edu/2023/06/28/after-15-years-pulsar-timing-yields-evidence-of-cosmic-gravitational-wave-background/ https://astrobites.org/2023/06/28/drop-the-bass-evidence-for-a-gravitational-wave-background-from-a-galaxy-sized-detector/ https://www.seti.org/press-release/nanogravs-15-year-journey-reveals-cosmic-hum Música de fondo: Darklight - John Dyson You Might As Well Just Do Nothing Instead - Stellardrone Apoya el proyecto Narices de Tycho: https://hoyenelcosmos.org/donar/ https://www.amazon.com.mx/hz/wishlist/ls/1E31R1L0P1CWV?ref_=wl_share Conviértete en miembro de la comunidad: https://www.youtube.com/channel/UCBZi8bpN1DG8IqaDnWpNNZQ/join Sígueme en: Web… https://hoyenelcosmos.org/ Twitter... @naricesdetycho Facebook... https://www.facebook.com/hoyenelcosmos Instagram... https://www.instagram.com/hoyenelcosmos/ Youtube... https://www.youtube.com/channel/naricesdetycho/ Sigue El Podcast de Hoy en el Cosmos en:

Máig rejtély, hogy miért lett mindenki rosszul egy rákos nő körül Telex     2023-07-02 09:33:29     Tudomány Rákbetegség Ápoló Miután Gloria Ramirez a riverside-i kórházba került, a vele érintkező orvosok és ápolók elájultak, lebénultak, egyikük két hétig volt intenzíven. Az 1994-es eset máig megoldatlan, de az egyik lehetséges magyarázat igen rossz fényt vet a kórházra. Légy észnél, ha a rendőrség banki adatokat kér Mínuszos     2023-07-02 04:33:49     Infotech Rendőrség Telefon Bankkártya Tiszavasvári Bankszámla-, illetve a bankkártyaadatok megszerzésére specializálódott, magukat rendőrnek kiadó csalókat fogtak el Tiszavasváriban. Egy hete tett bejelentést egy állampolgár, mert ismeretlenek több millió forintot emeltek le a bankszámlájáról. Az egyik elkövető rendőrként bemutatkozva a sértettnek telefonon azt mondta, hogy feltörték a számláját. A Bécs egy nagy kísérlet az emberiség számára 24.hu     2023-07-02 14:01:21     Tudomány Ausztria Bécs Globális felmelegedés Bécset gyakran választják a világ legélhetőbb városának, a globális felmelegedés azonban az osztrák fővárost sem kíméli. Dermesztő látni, ahogyan összeütközik, kigyullad, majd lezuhan két Tucano repülőgép Player     2023-07-02 15:06:07     Tudomány Repülőgép Légikatasztrófa Összeütközött, majd lezuhant két repülőgép Kolumbiában, miközben épp gyakorlatoztak. Az esetről a helyi hírügynökség számolt be. Rosszul tudtuk, mégsem ásványok, hanem valami jóval furcsább miatt vérvörös az antartikai vérzuhatag Rakéta     2023-07-02 12:57:26     Tudomány Szerencsére nem is vértől, viszont a felfedezés jelentősége túlmutat ezen a bolygón. Mostantól pofonegyszerű Dolby Visiont és Dolby Atmost rakni az Unreal Engine játékokba PCWorld     2023-07-02 06:52:28     Infotech Az új plugineknek köszönhetően a fejlesztők néhány kattintással megússzák a dolgot. Valóban képesek a macskák sírni? in.hu     2023-07-02 09:37:01     Tudomány Már az elején érdemes leszögezni: a macskák nem sírnak. Legalábbis nem abban az értelemben, ahogy elképzeljük. Van azonban néhány egyértelmű jel a viselkedésükben, amiből kiderülhet, hogy a cicánk éppen szomorú, szorong vagy esetleg fájdalmat érez.Saját fajunkon kívül egyetlen más állatról sem ismert, hogy érzelmi vagy fizikai fájdalom miatt könnye Free-to-playként jelenhet meg a The Sims 5! theGeek     2023-07-02 05:02:47     Gaming Az Electronic Arts (vagy most már mondjuk EA Entertainmentnek, miután a kiadó két részre bontotta magát, és a másik fél az EA Sports lenne) egyik álláshirdetése megerősíthette, hogy milyen stratégiát tervez követni az új The Simsszel. A Sims Community fedezte fel az álláshirdetést, ami „free-to-enter” jelzővel látta el a The Sims 5-öt. Ez azt jelen Riadót fújtak az okosórák miatt Index     2023-07-02 06:26:00     Mobiltech Okosóra Az új idők kiberfegyvere feltérképezi a helyi hálót, helyzeti adatokat küld, adatokat lop. Fekete lyukaktól zsong az Univerzum iPON!     2023-07-02 06:05:00     Tudomány A NANOGrav együttműködés kutatói sikeresen azonosították a világegyetem gravitációs „háttérsugárzását”. Korlátozza a Twitter, hogy egy felhasználó naponta hány bejegyzést láthat vg.hu     2023-07-02 11:29:44     Gazdaság Twitter Elon Musk Az ideiglenes intézkedésre Elon Musk szerint azért volt szükség, hogy megakadályozzák a botok adatgyűjtését. A rendőröket segítik a legmodernebb autók Startlap     2023-07-02 06:12:05     Autó-motor Rendőrség USA Robot Kamera Az önvezető autók olyanok a rendőrség számára mint gördülő megfigyelő kamerák, robotjárőrök. Az USA-ban a robotautók felvételeit is használják már a bűnüldözésben. Alapvető fontosságú szerves molekulát talált a James Webb-űrtávcső egy bolygókeletkezési korongban Csillagászat     2023-07-02 08:57:12     Tudomány Világűr NASA James Webb A csillagászoknak a NASA, az ESA és a CSA űrügynökségek által működtetett James Webb-űrtávcsővel most először sikerült kimutatniuk a metil kationt (CH3+) egy fiatal csillag körüli bolygókeletkezési korongban. Ennek az összetett ionnak van egy különleges tulajdonsága: gyengén reagál csak a világegyetem leggyakoribb elemével, a hidrogénnel, ugyanakko

Se anunció la detección de un fondo de ondas gravitacionales, una especie de ruido de fondo o una sinfonía debido a las perturbaciones del espacio tiempo probablemente causada por las colisiones de galaxias y la fusión de sus agujeros negros supermasivos. Esta es una de las noticias más importantes en términos astronómicos del año y nos abre una nueva forma de explorar el universo y su evolución.  Te cuento los detalles sobre como observar púlsares permitió esta hazaña y detalles sobre como por ejemplo las observaciones de Júpiter realizadas por la misión Juno de la NASA aportaron de forma indirecta para lograr la precisión requerida en este experimento Music by AlexiAction,NaturesEye and coma-media from Pixabay lifelike, abstract world, chill-abstract time-technology Horizontes Infinitos Tiempo Música de https://www.fiftysounds.com/es/

Máig rejtély, hogy miért lett mindenki rosszul egy rákos nő körül Telex     2023-07-02 09:33:29     Tudomány Rákbetegség Ápoló Miután Gloria Ramirez a riverside-i kórházba került, a vele érintkező orvosok és ápolók elájultak, lebénultak, egyikük két hétig volt intenzíven. Az 1994-es eset máig megoldatlan, de az egyik lehetséges magyarázat igen rossz fényt vet a kórházra. Légy észnél, ha a rendőrség banki adatokat kér Mínuszos     2023-07-02 04:33:49     Infotech Rendőrség Telefon Bankkártya Tiszavasvári Bankszámla-, illetve a bankkártyaadatok megszerzésére specializálódott, magukat rendőrnek kiadó csalókat fogtak el Tiszavasváriban. Egy hete tett bejelentést egy állampolgár, mert ismeretlenek több millió forintot emeltek le a bankszámlájáról. Az egyik elkövető rendőrként bemutatkozva a sértettnek telefonon azt mondta, hogy feltörték a számláját. A Bécs egy nagy kísérlet az emberiség számára 24.hu     2023-07-02 14:01:21     Tudomány Ausztria Bécs Globális felmelegedés Bécset gyakran választják a világ legélhetőbb városának, a globális felmelegedés azonban az osztrák fővárost sem kíméli. Dermesztő látni, ahogyan összeütközik, kigyullad, majd lezuhan két Tucano repülőgép Player     2023-07-02 15:06:07     Tudomány Repülőgép Légikatasztrófa Összeütközött, majd lezuhant két repülőgép Kolumbiában, miközben épp gyakorlatoztak. Az esetről a helyi hírügynökség számolt be. Rosszul tudtuk, mégsem ásványok, hanem valami jóval furcsább miatt vérvörös az antartikai vérzuhatag Rakéta     2023-07-02 12:57:26     Tudomány Szerencsére nem is vértől, viszont a felfedezés jelentősége túlmutat ezen a bolygón. Mostantól pofonegyszerű Dolby Visiont és Dolby Atmost rakni az Unreal Engine játékokba PCWorld     2023-07-02 06:52:28     Infotech Az új plugineknek köszönhetően a fejlesztők néhány kattintással megússzák a dolgot. Valóban képesek a macskák sírni? in.hu     2023-07-02 09:37:01     Tudomány Már az elején érdemes leszögezni: a macskák nem sírnak. Legalábbis nem abban az értelemben, ahogy elképzeljük. Van azonban néhány egyértelmű jel a viselkedésükben, amiből kiderülhet, hogy a cicánk éppen szomorú, szorong vagy esetleg fájdalmat érez.Saját fajunkon kívül egyetlen más állatról sem ismert, hogy érzelmi vagy fizikai fájdalom miatt könnye Free-to-playként jelenhet meg a The Sims 5! theGeek     2023-07-02 05:02:47     Gaming Az Electronic Arts (vagy most már mondjuk EA Entertainmentnek, miután a kiadó két részre bontotta magát, és a másik fél az EA Sports lenne) egyik álláshirdetése megerősíthette, hogy milyen stratégiát tervez követni az új The Simsszel. A Sims Community fedezte fel az álláshirdetést, ami „free-to-enter” jelzővel látta el a The Sims 5-öt. Ez azt jelen Riadót fújtak az okosórák miatt Index     2023-07-02 06:26:00     Mobiltech Okosóra Az új idők kiberfegyvere feltérképezi a helyi hálót, helyzeti adatokat küld, adatokat lop. Fekete lyukaktól zsong az Univerzum iPON!     2023-07-02 06:05:00     Tudomány A NANOGrav együttműködés kutatói sikeresen azonosították a világegyetem gravitációs „háttérsugárzását”. Korlátozza a Twitter, hogy egy felhasználó naponta hány bejegyzést láthat vg.hu     2023-07-02 11:29:44     Gazdaság Twitter Elon Musk Az ideiglenes intézkedésre Elon Musk szerint azért volt szükség, hogy megakadályozzák a botok adatgyűjtését. A rendőröket segítik a legmodernebb autók Startlap     2023-07-02 06:12:05     Autó-motor Rendőrség USA Robot Kamera Az önvezető autók olyanok a rendőrség számára mint gördülő megfigyelő kamerák, robotjárőrök. Az USA-ban a robotautók felvételeit is használják már a bűnüldözésben. Alapvető fontosságú szerves molekulát talált a James Webb-űrtávcső egy bolygókeletkezési korongban Csillagászat     2023-07-02 08:57:12     Tudomány Világűr NASA James Webb A csillagászoknak a NASA, az ESA és a CSA űrügynökségek által működtetett James Webb-űrtávcsővel most először sikerült kimutatniuk a metil kationt (CH3+) egy fiatal csillag körüli bolygókeletkezési korongban. Ennek az összetett ionnak van egy különleges tulajdonsága: gyengén reagál csak a világegyetem leggyakoribb elemével, a hidrogénnel, ugyanakko

(0:00) Bestie intros: Friedberg fills in as moderator! (2:45) Wagner Group rebellion (23:15) SCOTUS strikes down Affirmative Action (51:03) Databricks acquires MosaicML for $1.3B, Inflection raises $1.3B (1:09:35) IRL shuts down after faking 95% of users, Byju's seeks to raise emergency $1B as founder control in jeopardy (1:26:38) Science Corner: Understanding the NANOGrav findings Follow the besties: https://twitter.com/chamath https://linktr.ee/calacanis https://twitter.com/DavidSacks https://twitter.com/friedberg Follow the pod: https://twitter.com/theallinpod https://linktr.ee/allinpodcast Intro Music Credit: https://rb.gy/tppkzl https://twitter.com/yung_spielburg Intro Video Credit: https://twitter.com/TheZachEffect Referenced in the show: https://edition.cnn.com/2023/06/22/politics/ukraine-counteroffensive-western-assessment/index.html https://www.independent.co.uk/news/world/europe/putin-wagner-russia-treason-coup-b2363430.html https://www.statista.com/statistics/896181/putin-approval-rating-russia https://www.levada.ru/en/ratings https://twitter.com/MatreshkaRF/status/1673209794608365570 https://www.csis.org/blogs/post-soviet-post/la-vie-en-rose-why-kremlin-blacklisted-levada-center https://www.nytimes.com/2023/06/29/world/africa/central-african-republic-wagner-africa-syria.html https://www.cnbc.com/2023/06/29/supreme-court-rejects-affirmative-action-at-colleges-says-schools-cant-consider-race-in-admission.html https://en.wikipedia.org/wiki/Students_for_Fair_Admissions_v._Harvard https://twitter.com/greg_price11/status/1674426520100814848 https://www.nbcnews.com/news/us-news/study-harvard-finds-43-percent-white-students-are-legacy-athletes-n1060361 https://www.wsj.com/articles/databricks-strikes-1-3-billion-deal-for-generative-ai-startup-mosaicml-fdcefc06 https://www.snowflake.com/blog/snowflake-acquires-neeva-to-accelerate-search-in-the-data-cloud-through-generative-ai https://www.forbes.com/sites/alexkonrad/2023/06/29/inflection-ai-raises-1-billion-for-chatbot-pi https://www.theinformation.com/articles/social-app-irl-which-raised-200-million-shuts-down-after-ceo-misconduct-probe https://www.theinformation.com/articles/softbank-backed-messaging-app-irl-says-it-has-20-million-users-some-employees-have-doubts-about-that https://www.bloomberg.com/news/articles/2023-06-27/byju-s-seeks-to-raise-1-billion-to-sidestep-shareholder-revolt https://techcrunch.com/2023/06/27/prosus-byjus-markdown https://twitter.com/shaig/status/1673836979903950851 https://www.ft.com/content/b8a4214f-7f64-4d3a-97c4-4731f2effb0d https://twitter.com/chamath/status/1674469606746992651 https://pauloffit.substack.com/p/my-conversation-with-robert-f-kennedy https://www.quantamagazine.org/an-enormous-gravity-hum-moves-through-the-universe-20230628 https://physics.aps.org/articles/v16/116  

The universe scaling work of the NANOGrav team stands on the shoulders of giants to understand giants lurking in our universe. Huge decade spanning scientific projects like NANOGrav are built of ideas and concepts which we can trace back to earlier pioneers. NANOGrav relies on Pulsars to map the universe but the discovery of them can be traced back to one key woman, Jocelyn Bell Burnell. This week we dive into the discovery of Pulsars and how they have been used to make a new way of looking at the universe. Finding a periodic signal in the noise can be helpful but a whole universe them of them can widen our understanding. 

Daniel and Jorge break down the recent discovery of huge gravitational waves by NANOGrav, and what it means about supermassive black holes.See omnystudio.com/listener for privacy information.

Chiara Mingarelli is a gravitational-wave astrophysicist and a professor in the Department of Physics at Yale University. She studies supermassive black holes at the centers of galaxies and their mergers using data about gravitational waves that are detected by pulsar timing array experiments. In this episode, Robinson and Chiara discuss PTAs, gravitational waves, black holes, how and why they merge, and the fresh release of NANOgrav's fifteen-year data set, which gives the first ever evidence of a gravitational wave background in the universe, an unprecedented discovery that marks the dawn of a new era of astrophysical research. Chiara's Website: https://www.chiaramingarelli.com/ Chiara's Twitter: https://twitter.com/Dr_CMingarelli OUTLINE 00:00 In This Episode... 00:30 Introduction 02:58 Chiara's Interest in Black Holes 10:25 What Are Gravitational Waves 15:47 Detecting Gravitational Waves 31:39 How to Visualize Black Holes 40:55 Black Holes and Gravitational Waves 48:51 Two Different Backgrounds 53:46 Collecting and Interpreting Data 56:36 Why Do Black Holes Anchor Galaxies? 58:34 Why Do Black Holes Form Binaries? 01:04:25 Lingering Questions 01:11:33 Cosmic Strings 01:17:35 NANOgrav's Data Release and the Gravitational Wave Background Robinson's Website: http://robinsonerhardt.com Robinson Erhardt researches symbolic logic and the foundations of mathematics at Stanford University. Join him in conversations with philosophers, scientists, weightlifters, artists, and everyone in-between.  --- Support this podcast: https://podcasters.spotify.com/pod/show/robinson-erhardt/support

Un hito en la astronomía ha ocurrido. Ondas gravitacionales de agujeros negros supermasivos se han detectado por primera vez. Son las más grandes conocidas, millones de veces más masivas que nuestro Sol. Se han formado a partir de la fusión de dos galaxias, creando enormes ondas que atraviesan el universo. Este hallazgo es revolucionario para la ciencia. Aporta una nueva perspectiva para investigar los agujeros negros. El descubrimiento abre un nuevo capítulo en la comprensión del cosmos.Ahora, entramos en una nueva fase de exploración astronómica.En 2016, la detección de ondas gravitacionales de agujeros negros más pequeños marcó un hito. Pero las ondas de estos agujeros negros supermasivos son diferentes. Son de baja frecuencia, lo que las hace más difíciles de detectar. Sin embargo, su tamaño y potencia las convierten en una fuente de información inestimable sobre el universo.Hasta ahora, solo se habían detectado ondas de agujeros negros menores. Estos son miles de veces más pequeños que los supermasivos. El primer descubrimiento fue en 2015. Dos agujeros negros, cada uno 30 veces más masivo que el sol, fusionándose. Las ondas que se generaron fueron una evidencia directa de su existencia.Ahora, los científicos de NANOGrav han utilizado la galaxia misma como un detector. Han monitoreado pulsares, los núcleos superdensos y giratorios de estrellas muertas. A través de estas observaciones, detectaron perturbaciones indicativas de ondas gravitacionales. Esta innovadora metodología ha permitido el avance significativo que hoy celebramos.El estudio de ondas gravitacionales de agujeros negros supermasivos ha dado un salto hacia adelante. El universo es aún más misterioso y fascinante de lo que pensábamos. Gracias a este hallazgo, estamos un paso más cerca de desentrañar sus secretos. Hoy celebramos este hito en nuestra exploración cósmica.En 2016, el Observatorio de Ondas Gravitacionales por Interferometría Láser (LIGO) detectó ondas gravitacionales provenientes de la fusión de dos agujeros negros relativamente pequeños, cada uno de ellos de aproximadamente 30 veces la masa del sol. Fue la primera vez que se detectaron las ondas gravitacionales, confirmándose así una predicción hecha por Albert Einstein en 1916 en su Teoría de la Relatividad General.Las ondas gravitacionales detectadas por LIGO son de alta frecuencia, y su detección requiere instrumentos de precisión extrema en la Tierra.El descubrimiento actual, por otro lado, es sobre la detección de señales que podrían provenir de las ondas gravitacionales generadas por agujeros negros supermasivos, millones a miles de millones de veces más masivos que el sol. Estos agujeros negros supermasivos residen en el centro de las galaxias, y cuando dos galaxias se fusionan, los agujeros negros supermasivos se orbitan mutuamente, generando ondas gravitacionales. Las ondas de estos eventos son de baja frecuencia y su detección no puede hacerse directamente con instrumentos en la Tierra como LIGO. En cambio, los astrónomos usan pulsares (núcleos de estrellas muertas que giran rápidamente) repartidos por toda la galaxia como una especie de detector de ondas gravitacionales. Cualquier cambio en el tiempo que tardan los pulsos de los pulsares en llegar a la Tierra puede indicar la presencia de estas ondas de baja frecuencia.Por lo tanto, aunque ambos descubrimientos están relacionados con las ondas gravitacionales, se diferencian en los eventos que generan las ondas y los métodos utilizados para detectarlas.

In this week's episode, David is joined by Chiara Mingarelli. Prof Mingarelli is currently moving from the University of Connecticut to Yale University and is theorist working on the so-called background gravitational wave signal. Predicted for decades but incredibly elusive, we are on the cusp of detecting this signal for the first time. Learn all about what this signal is and what it means for astronomy in today's episode. To support this podcast and our research lab, head to www.coolworldslab.com/support

This week and next week I will be talking to Will Lamb, good friend and fellow graduate student at Vanderbilt University. Will is originally from Wales, and moved to the U.S. specifically for graduate school. He works as part of the NANAGrav collaboration, and lives in Nashville, TN. He can also partner dance, which I think is very, very, cool! I hope y'all enjoy the episode! Find Will on Twitter: @LambAstroWill's Email: william.g.lamb@vanderbilt.eduReach out to AstronomerAnd: Twitter: @astronomerand Instagram: @astronomerandpodEmail: astronomerand@gmail.comShow Notes:NANOGrav collaboration: https://nanograv.org/Cover Art: iritmogilevsky.com, Instagram: irit.mog Theme Tune: Omar Chakor - https://www.fiverr.com/ch6k0rLand Acknowledgement:This podcast was recorded in Hawai'i. I recognize that her majesty Queen Liliʻuokalani yielded the Hawaiian Kingdom and these territories under duress and protest to the United States to avoid the bloodshed of her people. I further recognize that generations of indigenous Hawaiians and their knowledge systems shaped Hawaiʻi in a sustainable way that allows me to enjoy her gifts today.This episode was funded by the Curb Center in Nashville and we recognize that this land belonged to the Indigenous People before it came to be known as the state of Tennessee, or as the United States of America. We recognize that that Indigenous Peoples were the first residents of what we now know as the State of Tennessee and that Nashville is built upon the homelands and villages of the Indigenous Peoples of this region including the Shawnee, Cherokee, Choctaw, Chickasaw, and Yuchi tribal nations. Our ability to live and work in this state is the result of direct coercion, forced dispossession, and deliberate colonization. To ignore that is to perpetuate injustice to populations of people that continue to seek redistribution of land that was once theirs. We provide this land acknowledgement in recognition and respect of the indigenous people to whom this land truly belongs. We recognize that acknowledgment by itself is a small gesture, and that it becomes meaningful when coupled with authentic relationship and informed action. Inclusivity Statement: I wish for this podcast to be a safe space for those of every gender expression, sexual orientation, ability, race, religious group and age group. I am always trying to learn and improve on my unconscious bias. Any suggestions for improvement will be gratefully received at astronomerand@gmail.com.

Multi-messenger constraints on Abelian-Higgs cosmic string networks by Mark Hindmarsh et al. on Wednesday 12 October Nielsen-Olesen vortices in the Abelian-Higgs (AH) model are the simplest realisations of cosmic strings in a gauge field theory. Large-scale numerical solutions show that the dominant decay channel of a network of AH strings produced from random initial conditions is classical field radiation. However, they also show that with special initial conditions, loops of string can be created for which classical field radiation is suppressed, and which behave like Nambu-Goto (NG) strings with a dominant decay channel into gravitational radiation. This indicates that cosmic strings are generically sources of both high-energy particles and gravitational waves. Here we adopt a simple parametrisation of the AH string network allowing for both particle and gravitational wave production, which sets the basis for a "multi-messenger" investigation of this model. We find that, in order to explain the NANOGrav detection of a possible gravitational wave background, while satisfying the constraint on NG-like loop production from simulations and bounds from the cosmic microwave background, the tension of the AH string in Planck units $Gmu$ and the fraction of the NG-like loops $f_{rm NG}$ should satisfy $Gmu f_{rm NG}^{2.6} gtrsim 3.2times 10^{-13}$ at 95$%$ confidence. On the other hand, for such string tensions, constraints from the diffuse gamma-ray background (DGRB) indicate that more than 97$%$ of the total network energy should be converted to dark matter (DM) or dark radiation. We also consider joint constraints on the annihilation cross-section, the mass, and the relic abundance of DM produced by decays of strings. For example, for a DM mass of 500 GeV, the observed relic abundance can be explained by decaying AH strings that also account for the NANOGrav signal. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.06178v1

Constraints on primordial curvature spectrum from primordial black holes and scalar-induced gravitational waves by Zhu Yi et al. on Monday 10 October The observational data of primordial black holes and scalar-induced gravitational waves can constrain the primordial curvature perturbation at small scales. We parameterize the primordial curvature perturbation by a broken power law form and find that it is consistent with many inflation models that can produce primordial black holes, such as nonminimal derivative coupling inflation, scalar-tensor inflation, Gauss-Bonnet inflation, and K/G inflation. The constraints from primordial black holes on the primordial curvature power spectrum with the broken power law form are obtained, where the fraction of primordial black holes in dark matter is calculated by the peak theory. Both the real-space top-hat and the Gauss window functions are considered. The constraints on the amplitude of primordial curvature perturbation with Gauss window function are around three times larger than those with real-space top-hat window function. The constraints on the primordial curvature perturbation from the NANOGrav 12.5yrs data sets are displayed, where the NANOGrav signals are assumed as the scalar-induced gravitational waves, and only the first five frequency bins are used. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.03641v1

Constraints on primordial curvature spectrum from primordial black holes and scalar-induced gravitational waves by Zhu Yi et al. on Monday 10 October The observational data of primordial black holes and scalar-induced gravitational waves can constrain the primordial curvature perturbation at small scales. We parameterize the primordial curvature perturbation by a broken power law form and find that it is consistent with many inflation models that can produce primordial black holes, such as nonminimal derivative coupling inflation, scalar-tensor inflation, Gauss-Bonnet inflation, and K/G inflation. The constraints from primordial black holes on the primordial curvature power spectrum with the broken power law form are obtained, where the fraction of primordial black holes in dark matter is calculated by the peak theory. Both the real-space top-hat and the Gauss window functions are considered. The constraints on the amplitude of primordial curvature perturbation with Gauss window function are around three times larger than those with real-space top-hat window function. The constraints on the primordial curvature perturbation from the NANOGrav 12.5yrs data sets are displayed, where the NANOGrav signals are assumed as the scalar-induced gravitational waves, and only the first five frequency bins are used. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.03641v1

Controlling Outlier Contamination In Multimessenger Time-domain Searches For Supermasssive Binary Black Holes by Qiaohong Wang et al. on Monday 19 September Time-domain datasets of many varieties can be prone to statistical outliers that result from instrumental or astrophysical anomalies. These can impair searches for signals within the time series and lead to biased parameter estimation. Versatile outlier mitigation methods tuned toward multimessenger time-domain searches for supermassive binary black holes have yet to be fully explored. In an effort to perform robust outlier isolation with low computational costs, we propose a Gibbs sampling scheme. This provides structural simplicity to outlier modeling and isolation, as it requires minimal modifications to adapt to time-domain modeling scenarios with pulsar-timing array or photometric data. We robustly diagnose outliers present in simulated pulsar-timing datasets, and then further apply our methods to pulsar J$1909$$-$$3744$ from the NANOGrav 9-yr Dataset. We also explore the periodic binary-AGN candidate PG$1302$$-$$102$ using datasets from the Catalina Real-time Transient Survey, All-Sky Automated Survey for Supernovae, and the Lincoln Near-Earth Asteroid Research. We present our findings and outline future work that could improve outlier modeling and isolation for multimessenger time-domain searches. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2112.05698v2

Foundations of Amateur Radio In our hobby we use kilohertz and megahertz enthusiastically. Sometimes even gigahertz. The other day during a discussion the question arose, what comes after tera, as in terahertz? I couldn't remember, so I had to look it up, peta comes next, then exa, zetta and yotta, derived from the Greek word for eight. That in and of itself was interesting, but it turns out that Greek isn't the only language used in attributing SI metric prefixes, SI being the International System of Units. Of the 20 units, which I'll get to in a moment, there's 12 with Greek origins, five deriving from Latin, two from Danish and one from Spanish. The units are used to describe how many of a thing there are in base-10, so, a thousand of something is kilo, or ten to the power of three, which gives us kilohertz. A gigahertz is ten to the power of nine and so-on. Interestingly, kilo is derived from the Greek word thousand, but mega comes from the Greek for great. Both hecto, as in hectopascals and deca as in decathlon originate in the Greek words for hundred and ten. The prefix pico, as in picofarad comes from the Spanish word peak and femto as in femtowatt comes from the Danish for fifteen, as in ten to the power of minus 15. Apparently a zeptomole of a substance contains 602 particles, even NASA says so, let me know if you can find a source for that. I could devote my entire discussion on these 20 units, adding for example that their naming wasn't all done at the same time, the most recent additions are yotta and yocto, as I said, derived from the Greek for eight, being ten to the power of 24. How's that eight you ask? Well, three times eight is 24. I'm not saying it's intuitive, but there is logic. In looking at all these units, and specifically the smaller ones, milli, micro, nano, pico and the like, it occurred to me, is there a way to go below one Hertz, could you have half a Hertz? Hertz is the number of oscillations per second, a single Hertz being one per second. Half a Hertz would be one oscillation per two seconds. I started wondering what to look for in discovering if anyone has been playing with this. For the life of me, I couldn't think of what to search for and my experience tells me that if you cannot find the answer online, you're asking the wrong question. This morning, with a fresh cup of coffee in my hands, it occurred to me that anyone doing this kind of stuff would be using SI units, so they'd be using decihertz, centihertz, millihertz, microhertz and nanohertz, perhaps even picohertz. So I went searching. Turns out that this actually exists. After wading through endless results with conversion tools and dictionaries, there's plenty of research to find. The unit decihertz is being used in gravitational wave interferometry, specifically, there's a Japanese, space-based gravitational wave observatory in the works with hopes of launching their three space craft if they can find funding. It doesn't end there. There are experimental imaging studies being made on malignant and benign human cancer cells and tissues looking at decihertz all the way down to yoctohertz, that's ten to the minus 24. Inside Apple software development documentation, in addition to mega, giga and terahertz you can find links to milli, micro and nanohertz as predefined units. NANOGrav stands for North American Nanohertz Observatory for Gravitational Waves and it uses the Galaxy to detect them. It was founded in 2007 and is part of a global community of scientists in places like Australia, where the Parkes Pulsar Timing Array is located - yes, that Parkes - made famous from the film "the Dish" and Europe with the European Pulsar Timing Array, combining five separate radio-telescopes, all coming together under the banner of the IPTA or International Pulsar Timing Array. The point of my little exploration is that if you're curious about random things, you can often come across activities and ideas you know nothing about and learn something along the way. Today I learnt that there is such a thing as a sub-Hertz signal, it's being explored all over the globe with scientists in different fields and it's happening without much in the way of public awareness. What did you learn today and which SI prefix didn't I use? I'm Onno VK6FLAB

The “ticking” of dozens of dead stars has revealed a possible “hum” that fills the universe. Ideas for just what causes the hum range from pairs of supermassive black holes to long “strings” forged in the Big Bang. The ticking is produced by pulsars — the ultra-dense corpses of once-mighty stars. They spin at up to hundreds of times per second, emitting pulses of radio waves with each turn. They “tick” with a steady beat. Any change in timing is likely caused by something besides the pulsars themselves, such as the gravitational pull of a companion star. A project known as Nano-grav has monitored several dozen of the steadiest pulsars for years. Tiny changes in their timing have revealed the possible “hum” — perhaps the result of “ripples” in space and time known as gravitational waves. As they move through space, the waves change the distances between objects by less than the size of an atom. That could cause the pulsar timing to vary by an extremely small amount. One possible origin for the waves is giant black holes in orbit around each other, churning space like a giant blender. Another possibility is cosmic strings — vibrating ribbons created in the Big Bang. And yet another is dark matter — matter that we see only through its gravitational pull on the normal matter around it. Much more work is needed to confirm the Nanograv results — and prove that something is humming along through the universe. Script by Damond Benningfield Support McDonald Observatory

Les trous noirs ont une sacrée dalle. Rien ne leur échappe dans les environs, y compris leurs congénères. Attirés l'un vers l'autre, se tournant autour, les deux ogres entament ainsi une danse à une vitesse proche de celles de la lumière, jusqu'à fusionner. Leur ronde endiablée est tellement puissante qu'elle produit des vagues à travers l'espace-temps : des ondes gravitationnelles. Ce sont elles que les chercheurs du projet Nanograv sont parvenus à identifier récemment.Un exploit qui ouvre la voie à une discipline naissante et prometteuse, l'astronomie gravitationnelle. Avec des objectifs vertigineux : révéler l'existence d'objets (pour l'instant hypothétiques) aussi anciens que l'univers, comme les cordes cosmiques, qui se seraient formées dans les tout premiers instants après le Big Bang, ou les trous noirs primordiaux, apparus avant même les premières étoiles. Fabrice Nicot, l'expert physique et astronomie de la rédaction de Sciences et Avenir, défriche le sujet à nos côtés. Bonne écoute!Et si voulez nous laisser un message, c'est possible en cliquant ici ou via le lien ci-contre https://www.shello.io/rgouloumes/appris-sixieme-sciencePrésenté et préparé par Romain GouloumèsMontage/mixage : Studio PlinkOpening : Nightmares, Alexander Nakarada (morceau libre de droit repéré par cchound.com) ; extraits sonores de Zonesons.com ; conception Romain GouloumèsNappe: Magic by @TONEZPRO https://soundcloud.com/tonez-pro (CC by 3.0)Cover de l'épisode : montage 20Minutes ; illustration brightstars ; yelet et Visual Generation Voir Acast.com/privacy pour les informations sur la vie privée et l'opt-out.

Prof. Chiara Mingarelli is a gravitational-wave astrophysicist, looking to understand how supermassive black holes in the centers of massive galaxies merge, if at all. She does this by predicting their nanohertz gravitational-wave signatures, which will soon be detected by pulsar timing array experiments. With pulsar timing data, She looks for both individual supermassive black holes in binary systems, and for the gravitational-wave background which should be generated by their cosmic merger history. She an assistant professor at the University of Connecticut, and an associate research scientist at the Center for Computational Astrophysics (CCA) at the Flatiron Institute. Before joining the CCA she was a Marie Curie International Outgoing Fellow at Caltech and at the Max Planck Institute for Radio Astronomy. PRESS RELEASE: In data gathered and analyzed over 13 years, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has found an intriguing low-frequency signal that may be attributable to gravitational waves. NANOGrav researchers studying the signals from distant pulsars – small, dense stars that rapidly rotate, emitting beamed radio waves, much like a lighthouse – have used radio telescopes to collect data that may indicate the effects of gravitational waves, as reported recently in The Astrophysical Journal Letters. NANOGrav has been able to rule out some effects other than gravitational waves, such as interference from the matter in our own solar system or certain errors in the data collection. These newest findings set up direct detection of gravitational waves as the possible next major step for NANOGrav and other members of the International Pulsar Timing Array (IPTA), a collaboration of researchers using the world’s largest radio telescopes. “It is incredibly exciting to see such a strong signal emerge from the data,” says Joseph Simon, lead researcher on the paper. “However, because the gravitational-wave signal we are searching for spans the entire duration of our observations, we need to carefully understand our noise. This leaves us in a very interesting place, where we can strongly rule out some known noise sources, but we cannot yet say whether the signal is indeed from gravitational waves. For that, we will need more data.” Gravitational waves are ripples in space-time caused by the movements of incredibly massive objects, such as black holes orbiting each other or neutron stars colliding. Astronomers cannot observe these waves with a telescope like they do stars and galaxies. Instead, they measure the effects passing gravitational waves have, namely tiny changes to the precise position of objects - including the position of the Earth itself. Support the podcast: https://www.patreon.com/drbriankeating And please join my mailing list to get resources and enter giveaways to win a FREE copy of my book (and more) http://briankeating.com/mailing_list.php

Lopen er echt één dimensionale draden door ons heelal? Nanograv: http://nanograv.org/ Artikel Maarten Verdult: https://webspace.science.uu.nl/~proko101/MaartenVerdult_cs2.pdf Cosmic String Interpretation of NANOGrav Pulsar Timing Data: https://arxiv.org/pdf/2009.06555.pdf Artikel "More is different": https://cse-robotics.engr.tamu.edu/dshell/cs689/papers/anderson72more_is_different.pdf Spacebound: https://spacebound.nl/ Apollo in real time: https://apolloinrealtime.org/