Podcasts about Schwarzschild

Play Episode Listen Later Nov 24, 2022 0:57

Constraints on Yukawa gravity parameters from observations of bright stars by P. Jovanović et al. on Thursday 24 November In this paper we investigate a Yukawa gravity modification of the Newtonian gravitational potential in a weak field approximation. For that purpose we derived the corresponding equations of motion and used them to perform two-body simulations of the stellar orbits. In 2020 the GRAVITY Collaboration detected the orbital precession of the S2 star around the supermassive black hole (SMBH) at the Galactic Center (GC) and showed that it is close to the general relativity (GR) prediction. Using this observational fact, we evaluated parameters of the Yukawa gravity (the range of Yukawa interaction $Lambda$ and universal constant $delta$) with the Schwarzschild precession of the S-stars assuming that the observed Schwarzschild precession will be equal to their GR estimates. GR provides the most natural way to fit observational data for S-star orbits, however, their precessions can be fitted by Yukawa gravity. Our main goal was to study the possible influence of the strength of Yukawa interaction, i.e. the universal constant $delta$, on the precessions of S-star orbits. We analyze S-star orbits assuming different strength of Yukawa interaction $delta$ and find that this parameter has strong influence on range of Yukawa interaction $Lambda$. Using MCMC simulations we obtain the best-fit values and uncertanties of Yukawa gravity parameters for S-stars. Also, we introduce a new criterion which can be used for classification of gravitational systems in this type of gravity, according to their scales. We demonstrated that performed analysis of the observed S-stars orbits around the GC in the frame of the Yukawa gravity represent a tool for constraining the Yukawa gravity parameters and probing the predictions of gravity theories. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12951v1

stars bright gravity observations constraints gc s2 lambda parameters arxiv schwarzschild yukawa

Constraints on Yukawa gravity parameters from observations of bright stars

Play Episode Listen Later Nov 23, 2022 0:55

Constraints on Yukawa gravity parameters from observations of bright stars by P. Jovanović et al. on Wednesday 23 November In this paper we investigate a Yukawa gravity modification of the Newtonian gravitational potential in a weak field approximation. For that purpose we derived the corresponding equations of motion and used them to perform two-body simulations of the stellar orbits. In 2020 the GRAVITY Collaboration detected the orbital precession of the S2 star around the supermassive black hole (SMBH) at the Galactic Center (GC) and showed that it is close to the general relativity (GR) prediction. Using this observational fact, we evaluated parameters of the Yukawa gravity (the range of Yukawa interaction $Lambda$ and universal constant $delta$) with the Schwarzschild precession of the S-stars assuming that the observed Schwarzschild precession will be equal to their GR estimates. GR provides the most natural way to fit observational data for S-star orbits, however, their precessions can be fitted by Yukawa gravity. Our main goal was to study the possible influence of the strength of Yukawa interaction, i.e. the universal constant $delta$, on the precessions of S-star orbits. We analyze S-star orbits assuming different strength of Yukawa interaction $delta$ and find that this parameter has strong influence on range of Yukawa interaction $Lambda$. Using MCMC simulations we obtain the best-fit values and uncertanties of Yukawa gravity parameters for S-stars. Also, we introduce a new criterion which can be used for classification of gravitational systems in this type of gravity, according to their scales. We demonstrated that performed analysis of the observed S-stars orbits around the GC in the frame of the Yukawa gravity represent a tool for constraining the Yukawa gravity parameters and probing the predictions of gravity theories. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12951v1

stars bright gravity observations constraints gc s2 lambda parameters arxiv schwarzschild yukawa

Modelling the accretion and feedback of supermassive black hole binaries in gas-rich galaxy mergers

Play Episode Listen Later Nov 23, 2022 1:08

Modelling the accretion and feedback of supermassive black hole binaries in gas-rich galaxy mergers by Shihong Liao et al. on Wednesday 23 November We introduce a new model for the accretion and feedback of supermassive black hole (SMBH) binaries to the KETJU code, which enables us to resolve the evolution of SMBH binaries down to separations of tens of Schwarzschild radii in gas-rich galaxy mergers. Our subgrid binary accretion model extends the widely used Bondi--Hoyle--Lyttleton accretion into the binary phase and incorporates preferential mass accretion onto the secondary SMBH, which is motivated by results from small-scale hydrodynamical circumbinary disc simulations. We perform idealised gas-rich disc galaxy merger simulations using pure thermal or pure kinetic active galactic nuclei (AGN) feedback. Our binary accretion model provides more physically motivated SMBH mass ratios, which are one of the key parameters for computing gravitational wave (GW) induced recoil velocities. The merger time-scales of our simulated SMBH binaries are in the range $t_{rm merge}{sim} 10$--$400$ Myr. Prograde in-plane equal-mass galaxy mergers lead to the shortest merger time-scales, as they experience the strongest starbursts, with the ensuing high stellar density resulting in a rapid SMBH coalescence. Compared to the thermal AGN feedback, the kinetic AGN feedback predicts longer merger time-scales and results in more core-like stellar profiles, as it is more effective in removing gas from the galaxy centre and quenching star formation. This suggests that the AGN feedback implementation plays a critical role in modelling SMBH coalescences. Our model will be useful for improving the modelling of SMBH mergers in gas-rich galaxies, the prime targets for the upcoming LISA GW observatory. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.11788v1

rich galaxy mergers gw modelling agn binaries arxiv supermassive black holes myr accretion schwarzschild prograde

Modelling the accretion and feedback of supermassive black hole binaries in gas-rich galaxy mergers

Play Episode Listen Later Nov 22, 2022 0:59

Modelling the accretion and feedback of supermassive black hole binaries in gas-rich galaxy mergers by Shihong Liao et al. on Tuesday 22 November We introduce a new model for the accretion and feedback of supermassive black hole (SMBH) binaries to the KETJU code, which enables us to resolve the evolution of SMBH binaries down to separations of tens of Schwarzschild radii in gas-rich galaxy mergers. Our subgrid binary accretion model extends the widely used Bondi--Hoyle--Lyttleton accretion into the binary phase and incorporates preferential mass accretion onto the secondary SMBH, which is motivated by results from small-scale hydrodynamical circumbinary disc simulations. We perform idealised gas-rich disc galaxy merger simulations using pure thermal or pure kinetic active galactic nuclei (AGN) feedback. Our binary accretion model provides more physically motivated SMBH mass ratios, which are one of the key parameters for computing gravitational wave (GW) induced recoil velocities. The merger time-scales of our simulated SMBH binaries are in the range $t_{rm merge}{sim} 10$--$400$ Myr. Prograde in-plane equal-mass galaxy mergers lead to the shortest merger time-scales, as they experience the strongest starbursts, with the ensuing high stellar density resulting in a rapid SMBH coalescence. Compared to the thermal AGN feedback, the kinetic AGN feedback predicts longer merger time-scales and results in more core-like stellar profiles, as it is more effective in removing gas from the galaxy centre and quenching star formation. This suggests that the AGN feedback implementation plays a critical role in modelling SMBH coalescences. Our model will be useful for improving the modelling of SMBH mergers in gas-rich galaxies, the prime targets for the upcoming LISA GW observatory. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.11788v1

rich galaxy mergers gw modelling agn binaries arxiv supermassive black holes myr accretion schwarzschild prograde

Gravitational lensing of pulsars as a probe of dark matter halos

Play Episode Listen Later Oct 12, 2022 1:00

Gravitational lensing of pulsars as a probe of dark matter halos by Francesca von Braun-Bates. on Wednesday 12 October A particular open problem in cosmology is whether dark matter on small scales is clumpy, forming gravitationally-bound halos distributed within the Galaxy. The practical difficulties inherent in testing this hypothesis stem from the fact that, on astrophysical scales, dark matter is solely observable via its gravitational interaction with other objects. This thesis presents a gravitational-lensing-based solution for the mapping and characterisation of low-mass, dark matter halos via their signature in millisecond pulsar observations. This involves: first, determining the time delay and magnification surfaces generated in the frame of reference of the halo; second, obtaining the corresponding pulsar signature in the reference frame of the observer; and last, generalising the method to multiple halos at varying distances. We discuss whether the delay is observationally detectable for both single and multiple lenses. The key dependency of the time delay is the density profile adopted for the halo. I utilise a variety of proposed halo mass profiles -- elliptical, Schwarzschild, horizontal-disc lenses and the Navarro-Frenk-White (NFW) density profile -- which are applicable over a broad range of halo masses. I demonstrate the use of Hankel transforms to increase the efficiency of the relativistic time delay calculation. The observational signatures of such halos are best identified using millisecond pulsars due to their high rotational frequencies and period stability. My method does not require major adjustments when searching for signs of lensing, thus it is unnecessary to implement specialist data reduction pipelines. Thus we can leverage data from both existing and future surveys easily. This method is readily extensible to nearby globular clusters and galaxies, pending improvements in pulsar detection at such distances. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.06151v1

galaxy probe dark matter pulsars halos gravitational arxiv schwarzschild gravitational lensing hankel

Collimation of the relativistic jet in the quasar 3C 273

Play Episode Listen Later Oct 10, 2022 1:02

Collimation of the relativistic jet in the quasar 3C 273 by Hiroki Okino et al. on Monday 10 October The collimation of relativistic jets launched from the vicinity of supermassive black holes (SMBHs) at the centers of active galactic nuclei (AGN) is one of the key questions to understand the nature of AGN jets. However, little is known about the detailed jet structure for AGN like quasars since very high angular resolutions are required to resolve these objects. We present very long baseline interferometry (VLBI) observations of the archetypical quasar 3C 273 at 86 GHz, performed with the Global Millimeter VLBI Array, for the first time including the Atacama Large Millimeter/submillimeter Array. Our observations achieve a high angular resolution down to $sim$60 ${rm mu}$as, resolving the innermost part of the jet ever on scales of $sim 10^5$ Schwarzschild radii. Our observations, including close-in-time High Sensitivity Array observations of 3C 273 at 15, 22, and 43 GHz, suggest that the inner jet collimates parabolically, while the outer jet expands conically, similar to jets from other nearby low luminosity AGN. We discovered the jet collimation break around $10^{7}$ Schwarzschild radii, providing the first compelling evidence for structural transition in a quasar jet. The location of the collimation break for 3C 273 is farther downstream the sphere of gravitational influence (SGI) from the central SMBH. With the results for other AGN jets, our results show that the end of the collimation zone in AGN jets is governed not only by the SGI of the SMBH but also by the more diverse properties of the central nuclei. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2112.12233v2

agn array 3c quasar ghz arxiv sgi schwarzschild vlbi smbhs

Orbital motion near Sagittarius A* -- Constraints from polarimetric ALMA observations

motion accounting observations assuming constraints sagittarius orbital arxiv event horizon telescope galactic center schwarzschild

Play Episode Listen Later Sep 21, 2022 0:57

Orbital motion near Sagittarius A* -- Constraints from polarimetric ALMA observations by Maciek Wielgus et al. on Wednesday 21 September We report on the polarized light curves of the Galactic Center supermassive black hole Sagittarius A*, obtained at millimeter wavelength with the Atacama Large Millimeter/submillimeter Array (ALMA). The observations took place as a part of the Event Horizon Telescope campaign. We compare the observations taken during the low variability source state on 2017 Apr 6 and 7 with those taken immediately after the X-ray flare on 2017 Apr 11. For the latter case, we observe rotation of the electric vector position angle with a timescale of $sim 70$ min. We interpret this rotation as a signature of the equatorial clockwise orbital motion of a hot spot embedded in a magnetic field dominated by a dynamically important vertical component, observed at a low inclination $sim20^circ$. The hot spot radiates strongly polarized synchrotron emission, briefly dominating the linear polarization measured by ALMA in the unresolved source. Our simple emission model captures the overall features of the polarized light curves remarkably well. Assuming a Keplerian orbit, we find the hot spot orbital radius to be $sim$ 5 Schwarzschild radii. We observe hints of a positive black hole spin, that is, a prograde hot spot motion. Accounting for the rapidly varying rotation measure, we estimate the projected on-sky axis of the angular momentum of the hot spot to be $sim 60^circ$ east of north, with a 180$^circ$ ambiguity. These results suggest that the accretion structure in Sgr A* is a magnetically arrested disk rotating clockwise. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.09926v1

Samuil Kaplan and the development of astrophysical research at the Lviv University dedicated to the 100th anniversary of his birth

university earth research ukraine development birth candidate dedicated kaplan lviv respective arxiv schwarzschild astrophysical

Play Episode Listen Later Sep 20, 2022 0:59

Samuil Kaplan and the development of astrophysical research at the Lviv University dedicated to the 100th anniversary of his birth by Bohdan Novosyadlyj et al. on Tuesday 20 September Samuil Kaplan (1921-1978) was a productive and famous astrophysicist. He was affiliated with a number of scientific centers in different cities of former Soviet Union. The earliest 13 years of his career, namely in the 1948-1961 years, he worked in Lviv University in Ukraine (then it was called the Ukrainian Soviet Socialist Republic). In the present paper, the Lviv period of his life and scientific activity is described on the basis of archival materials and his published studies. Kaplan arrived in Lviv in June 1948, at the same month when he obtained the degree of Candidate of science. He was a head of the astrophysics sector at the Astronomical Observatory of the University, was a professor of department for theoretical physics as well as the founder and head of a station for optical observations of artificial satellites of Earth. He was active in the organization of the astronomical observational site outside of the city. During the years in Lviv, Kaplan wrote more than 80 articles and 3 monographs in 9 areas. The focus of his interests at that time was on stability of circular orbits in the Schwarzschild field, on white dwarf theory, on space gas dynamics, and cosmic plasma physics, and turbulence, on acceleration of cosmic rays, on physics of interstellar medium, on physics and evolution of stars, on cosmology and gravitation, and on optical observations of Earth artificial satellites. Some of his results are fundamental for development of theory in these fields as well as of observational techniques. The complete bibliography of his works published during the Lviv period is presented. Respective scientific achievements of Samuil Kaplan are reviewed in the light of the current state of research in these areas. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.09494v1

The Very Rev. Malcolm Clemens Young, ThD

Sermons from Grace Cathedral

Play Episode Listen Later Sep 11, 2022 15:42

“Rejoice with me for I have found my sheep that was lost” (Lk. 15). Jeremiah 4:11-12, 22-28 Psalm 14 1 Timothy 1:12-17 Luke 15:1-10 Mark Johnson and George Lakoff's Metaphors We Live By is one of my favorite books. These authors point out that simple unexamined metaphors lie behind the very structure of our thought. The idea of “argument as war” is an example. We talk about winning an argument, an indefensible position, being right on target, shooting down an assumption, etc. We could imagine another culture regarding argument as being more like a kind of dance.[i] Today Jesus addresses two primal understandings of religion that deeply influenced the people of his society and our own. The first is the idea of a spiritual quest, a search for God. The second idea is that of church as a community of saints set apart from the world. Jesus upsets assumptions that lie so deep in our consciousness that we simply assume that this is just what life in God means. The spiritual quest. On December 24, 1915 Albert Einstein was drinking tea in his Berlin apartment when he received a crumpled, muddy, blood-stained letter from the trenches of World War I. It contained a message from the great genius and astronomer Karl Schwarzschild (1873-1916). Let me quote the letter's final words. “As you see, the war treated me kindly enough, in spite of heavy gunfire, to allow me to get away from it all and take this walk in the land of your ideas.”[ii] The letter astounded Einstein not simply because one of the most respected scientists in Germany was commanding an artillery unit on the Russian front, or because of the author's fear of a coming catastrophe. In tiny print on the back page, only legible through the use of a magnifying glass, Schwarzschild had sent him the first exact solution to the Einstein field equations of general relativity. Schwarzschild's approach worked well on a normal star which you might imagine as being like a bowling ball sitting on your bed and gently compressing the space around it. The problem arises when a large star exhausts its fuel and collapses. That star would keep compressing until the force of gravity grew to be so great that space would become infinitely curved and closed in on itself. The result would be, “an inescapable abyss permanently cut off from the rest of the universe.” Out of a sense of duty and perhaps also to show that a faithful Jew could be a good German, Schwarzschild volunteered to serve in the war. During a mustard gas attack he helped two of his men put on masks. Slow to put on his own, this exposure may have been what initiated an autoimmune disorder that painfully covered his body with sores and killed him months later. At first Schwarzschild dismissed his discovery as a kind of mathematical anomaly, but over time it began to really frighten him. In his last letter from Russia to his wife he wrote that this idea, “has an irrepressible force and darkens all my thoughts. It is a void without form or dimension, a shadow I can't see, but one that I can feel with the entirety of my soul.” A young man named Richard Courant stayed up talking with Schwarzschild on the night before he died. Schwarzschild told him that this concentration of mass would distort space and causality.[iii] The true horror was that since light would never escape from it, this singularity was unknowable, utterly unchanging, entirely isolated from everything else. Schwarzschild was one of the first people to contemplate the meaning of a black hole.[iv] But all of us are quite capable of imagining a place completely cut off from God. In fact most of us have been there. Isolation can feel terrifying. Perhaps you feel misunderstood, or set apart by a secret, or by experiences that makes you different from the people around you. Maybe you believe that something that you did in the past simply cannot be forgiven or that you have been harmed and cannot be healed. Perhaps just the busyness of your life, or the loneliness of it, makes real connection with another person impossible. Or maybe you just feel that you are missing something that others have, that you are cut off from God. The religious leaders of Jesus' time see him sharing meals with deplorable, notoriously immoral people, with prostitutes and the tax collectors who collaborate with the Roman army. They often point out that these people haven't really changed or repented. They wonder if Jesus is incurably naïve. They argue that someone who was from God would have the wisdom to realize how bad these people really are. In response Jesus tells three stories. One is about a wealthy shepherd who leaves ninety-nine sheep to find one in the wilderness. “When he has found it, he lays it on his shoulders and rejoices” (Lk. 15). Another is about a woman sweeping the whole house to find a coin and concludes saying, “There is joy in the presence of the angels over one sinner who repents.” The last is the story of the Prodigal Son. In other words Jesus takes our dominant metaphor of a spiritual quest and turns it on its head. Religion is not about seeking God. It is about God's persistence in finding us. It is about overcoming separation and the joy of reunion. As a young management consultant one of my closest friends in our Santa Monica office was a young engineer named Walid Iskandar. Walid had grown up in Lebanon during the 1970's. He was a deeply sincere, thoughtful and fun person with a kind of mischievous smile that I can still see in my mind's eye. In college I played rugby with a young freshman who was still trying to figure out the game. His name was Mark Bingham. What these two friends of mine share in common is that they both lost their lives twenty one years ago today when terrorists hijacked their airplanes. In my imagination they are perpetually young. In their last moments, despite the confusion and fear, I believe that God was with them. In 2018 twelve boys on a soccer team with their coach found themselves trapped deep below the earth in a labyrinthine network of flooded caves in Thailand. As the monsoon season progressed it seemed impossible to nearly everyone in the world that they would be saved. Cave divers from England talked about not being able to see their hands in front of their masks, of wriggling through impossibly narrow spaces again and again unsure of the way out. I will never forget that image of the diver emerging from the water and the amazement on the boys' faces that they had been found. This joy at being discovered lies at the heart of faith. The second idea that Jesus overturns is that the church exists as a community of holy people set apart from the world. You see this in the conviction that you must first think, say, or do something before you can be acceptable to God. A few weeks ago a very close friend went to the funeral of her father. At the end of the service, the very last words that the pastor spoke went something like this. “Pat was a great husband, father, lawyer and community leader. But until Pat found Jesus and accepted him in his heart, he was a sinner. Only through the sacrifice of Jesus are we cleansed from sin. No matter how hard you might try to be good, until you have accepted Jesus you are a sinner.” Jesus completely overturns this picture of how to be in God. It's not that you become good and then God helps you. Instead, God helps us so that we can be healed. The critics of Jesus feel offended by his connection to the people who break the rules. And Jesus tells them, “these are exactly the people I came to help. God's love is abundant and overflowing. God will always persist in finding those who are lost.” The point is that God's love and mercy always comes before anything else. We do not first accept Jesus in our heart and then become free from sin. The church is not a community of former sinners, but of actively sinning sinners. God does not reward us for living well or believing something, God makes living well and faith itself possible by loving us back to life. Today we celebrate Congregation Sunday and our calling as a unique people of God. There is no other community quite like this one and I love who we are. But let me be perfectly clear, we have not stopped screwing up. And yet we are loved by God anyway. Although we continue to slip up, we keep encountering God's grace. This makes us a joyful community of people who against all odds God has found in the way that God is finding all people. Let me close with a poem by Denise Levertov about this peace that passes all understanding. It's called “The Avowal.” “As swimmers dare / to lie face to the sky / and water bears them, / as hawks rest upon air / and air sustains them, / so would I learn to attain / freefall, and float / into Creator Spirit's deep embrace, / knowing no effort earns / that all-surrounding grace.”[v] In the face of isolation, everyday cruelty and sudden death what metaphor are we going to live by? Will we choose to see our life as a spiritual quest or as the experience of being found by God? Are we the holy ones or lost souls grateful every day to be found by God. My friends rejoice with me. [i] George Lakoff and Mark Johnson, Metaphors We Live By (Chicago: University of Chicago Press, 1980) 3-7. [ii] Benjamín Labatut, When We Cease to Understand the World tr. Adrian Nathan West (New York: The New York Review of Books, 2020) 34ff. See also “Karl Schwarzschild” on Wikipedia. https://en.wikipedia.org/wiki/Karl_Schwarzschild [iii] A hypothetical traveler capable of surviving a journey into a black hole would receive light and information from the future. [iv] And the frightening question asked by this dying man was that if such a thing exists in nature, could there be something like this in the human psyche. Could a concentration of human will cause millions to be exploited so that the laws of human relations no longer held? Schwarzschild feared that this was already happening in Germany. [v] Denise Levertov, “The Avowal.” https://allpoetry.com/The-Avowal

Gravitational Lensing in a Universe with matter and Cosmological Constant

universe constant lambda cosmological arxiv schwarzschild gravitational lensing

Play Episode Listen Later Sep 11, 2022 0:34

Gravitational Lensing in a Universe with matter and Cosmological Constant by Pedro Bessa et al. on Sunday 11 September We extend the results obtained in cite{Piattella_2016, mcvittie_2015} for gravitational lensing in the McVittie metric by including the effect of the transition from the matter-dominated epoch of the Universe to the $Lambda$-dominated era. We derive a formula that agrees with the previous results for the McVittie metric at lowest order, and compare the lensing angle predictions obtained from the Schwarzschild approximation, the McVittie model and higher order corrections to the McVittie model. In doing this, we test if, beyond the correction from the accelerated expansion of the Universe, there is a need for including the matter content of the Universe in modeling lens systems at the redshifts observerd in lens systems. We investigate if there is a need for a modification of the lens equation from these corrections, and if so, to which order and whether it is measurable. We find that while the effect is of the same order as the one calculated previously, there is no significant contribution to the bending angle, as the 1st order effect is already of order $mathcal{O}(theta_O^4)$ in the observed angle. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.04063v1

Design and upgrade of the prototype Schwarzschild-Couder Telescope

Play Episode Listen Later Sep 7, 2022 0:54

Design and upgrade of the prototype Schwarzschild-Couder Telescope by Leslie Taylor. on Wednesday 07 September The Cherenkov Telescope Array (CTA) is the next-generation ground-based observatory for very-high energy gamma-ray astronomy. CTA will have unparalleled sensitivity and angular resolution and will detect gamma-ray sources nearly 100 times faster than current arrays, enabling valuable multiwavelength and multimessenger observations. The Schwarzschild-Couder Telescope (SCT) is a candidate for the Medium-Sized telescope in CTA. A prototype SCT (pSCT) has been constructed at the Fred Lawrence Whipple Observatory in Arizona USA. Its camera is currently partially instrumented with 1600 pixels (2.7 degree FOV). The small plate scale of the optical system allows densely packed silicon photomultipliers to be used, which combined with high-density trigger and waveform readout electronics enable the high-resolution camera. The camera's electronics are capable of imaging air shower development with waveform readout with nanosecond resolution. The pSCT was inaugurated in January 2019, with commissioning continuing throughout that year. The first campaign of observations with the pSCT was conducted in January and February of 2020. Gamma-ray emission from the Crab Nebula was detected with a significance of 8.6 sigma. An upgrade to the pSCT camera is currently underway. The upgrade will fully populate the focal plane, increasing the field of view to 8 degrees diameter, and lower the front-end electronics noise, enabling a lower trigger threshold and improved reconstruction and background rejection. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.02680v1

design arizona upgrade cta prototype gamma telescope arxiv fov crab nebula schwarzschild leslie taylor

Design and upgrade of the prototype Schwarzschild-Couder Telescope

Studio B - Lobpreisung und Verriss (Ein Literaturmagazin)

Play Episode Listen Later Sep 7, 2022 0:48

Design and upgrade of the prototype Schwarzschild-Couder Telescope by Leslie Taylor. on Wednesday 07 September The Cherenkov Telescope Array (CTA) is the next-generation ground-based observatory for very-high energy gamma-ray astronomy. CTA will have unparalleled sensitivity and angular resolution and will detect gamma-ray sources nearly 100 times faster than current arrays, enabling valuable multiwavelength and multimessenger observations. The Schwarzschild-Couder Telescope (SCT) is a candidate for the Medium-Sized telescope in CTA. A prototype SCT (pSCT) has been constructed at the Fred Lawrence Whipple Observatory in Arizona USA. Its camera is currently partially instrumented with 1600 pixels (2.7 degree FOV). The small plate scale of the optical system allows densely packed silicon photomultipliers to be used, which combined with high-density trigger and waveform readout electronics enable the high-resolution camera. The camera's electronics are capable of imaging air shower development with waveform readout with nanosecond resolution. The pSCT was inaugurated in January 2019, with commissioning continuing throughout that year. The first campaign of observations with the pSCT was conducted in January and February of 2020. Gamma-ray emission from the Crab Nebula was detected with a significance of 8.6 sigma. An upgrade to the pSCT camera is currently underway. The upgrade will fully populate the focal plane, increasing the field of view to 8 degrees diameter, and lower the front-end electronics noise, enabling a lower trigger threshold and improved reconstruction and background rejection. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.02680v1

design arizona upgrade cta prototype gamma telescope arxiv fov crab nebula schwarzschild leslie taylor

Richard Easther | The Big Bang, Inflation, and Gravitational Waves

The Cartesian Cafe

Play Episode Listen Later Aug 20, 2022 152:00

Richard Easther is a scientist, teacher, and communicator. He has been a Professor of Physics at the University of Auckland for over the last 10 years and was previously a professor of physics at Yale University. As a scientist, Richard covers ground that crosses particle physics, cosmology, astrophysics and astronomy, and in particular, focuses on the physics of the very early universe and the ways in which the universe changes between the Big Bang and the present day. In this episode, Richard and I discuss the details of cosmology at large, both technically and historically. We dive into Einstein's equations from general relativity and see what implications they have for an expanding universe alongside a discussion of the cast of characters involved in 20th century cosmology (Einstein, Hubble, Friedmann, Lemaitre, and others). We also discuss inflation, gravitational waves, the story behind Brian Keating's book Losing the Nobel Prize, and the current state of experiments and cosmology as a field. Originally published on May 3, 2022 on YouTube: https://youtu.be/DiXyZgukRmE Timestamps: 00:00:00 : Introduction 00:02:42 : Astronomy must have been one of the earliest sciences 00:03:57 : Eric Weinstein and Geometric Unity 00:13:47 : Outline of podcast 00:15:10 : Brian Keating, Losing the Nobel Prize, Geometric Unity 00:16:38 : Big Bang and General Relativity 00:21:07 : Einstein's equations 00:26:27 : Einstein and Hilbert 00:27:47 : Schwarzschild solution (typo in video) 00:33:07 : Hubble 00:35:54 : One galaxy versus infinitely many 00:36:16 : Olbers' paradox 00:39:55 : Friedmann and FRLW metric 00:41:53 : Friedmann metric was audacious? 00:46:05 : Friedmann equation 00:48:36 : How to start a fight in physics: West coast vs East coast metric and sign conventions. 00:50:05 : Flat vs spherical vs hyperbolic space 00:51:40 : Stress energy tensor terms 00:54:15 : Conversation laws and stress energy tensor 00:58:28 : Acceleration of the universe 01:05:12 : Derivation of a(t) ~ t^2/3 from preceding computations 01:05:37 : a = 0 is the Big Bang. How seriously can we take this? 01:07:09 : Lemaitre 01:11:51 : Was Hubble's observation of an expanding universe in 1929 a fresh observation? 01:13:45 : Without Einstein, no General Relativity? 01:14:45 : Two questions: General Relativity vs Quantum Mechanics and how to understand time and universe's expansion velocity (which can exceed the speed of light!) 01:17:58 : How much of the universe is observable 01:24:54 : Planck length 01:26:33 : Physics down to the Big Bang singularity 01:28:07 : Density of photons vs matter 01:33:41 : Inflation and Alan Guth 01:36:49 : No magnetic monopoles? 01:38:30 : Constant density requires negative pressure 01:42:42 : Is negative pressure contrived? 01:49:29 : Marrying General Relativity and Quantum Mechanics 01:51:58 : Symmetry breaking 01:53:50 : How to corroborate inflation? 01:56:21 : Sabine Hossenfelder's criticisms 02:00:19 : Gravitational waves 02:01:31 : LIGO 02:04:13 : CMB (Cosmic Microwave Background) 02:11:27 : Relationship between detecting gravitational waves and inflation 02:16:37 : BICEP2 02:19:06 : Brian Keating's Losing the Nobel Prize and the problem of dust 02:24:40 : BICEP3 02:26:26 : Wrap up: current state of cosmology Notes: Easther's blogpost on Eric Weinstein: http://excursionset.com/blog/2013/5/25/trainwrecks-i-have-seen Vice article on Eric Weinstein and Geometric Unity: https://www.vice.com/en/article/z3xbz4/eric-weinstein-says-he-solved-the-universes-mysteries-scientists-disagree Further learning: Matts Roos. "Introduction to Cosmology" Barbara Ryden. "Introduction to Cosmology" Our Cosmic Mistake About Gravitational Waves: https://www.youtube.com/watch?v=O0D-COVodzY

Benjamín Labatut: When We Cease to Understand the World

Play Episode Listen Later Jun 14, 2022 16:49

Diese Episode erschien bereits am 22. Mai 2022 in Textform, wir reichen hier die Audioversion nach.Der Abgrund zwischen meiner Liebe zur Mathematik und meiner kompletten, absoluten Unfähigkeit diese Auszuüben könnte tiefer nicht sein.So erschuf ich, schulpflichtig, bei der Kalkulation einfachster chemischer Formeln, bei der man im Grunde nur die kleinen Zahlen am Fuß der chemischen Elemente im Kopf addieren muss, die phantastisch-unmöglichsten Verbindungen zum kopfschüttelnden Spott des gestrengen Herrn Chemielehrer, gleichzeitig gab es nichts faszinierenderes für mich, als wenn man mir versuchte zu erklären wie man mittels einer mathematischen Berechnung namens Fouriertransformation Uropas Stimme auf dem nahezu abgeschliffenen Wachszylinder hörbar machen kann.Heute, älter, nicht schlauer, ist für mich die zweitgeilste Erfindung nach dem Schnittbrot die Möglichkeit ins Google-Suchfeld 12+14 einzugeben und augenblicklich, achtund.. sechsunddreißig angezeigt zu bekommen. Schau ich dann auf vom Notebook steht im Bücherregal prominent der sechs Zentimeter breite Buchrücken des fantastischsten Kompendiums der Mathematik ever “Mathematics: From the Birth of Numbers”, des schwedischen Kinderarztes Jan Gullberg, ein irres Werk, welches von “What’s a number?” bis zum Kolmogoroffschen Dreireihensatz das komplette Menschheitswissen über die Mathematik hält und didaktisch und ästhetisch so grandios ist, dass ich stundenlang wie ein Kind darin blättern kann, um mich einfach nur am Buchsatz zu ergötzen.Diese Faszination an der Mathematik erklärt mir der innere Küchenpsychologe mit einem heftigen Streben danach, den Dingen auf den Grund zu gehen. Ein paradoxerweise in der Schulmathematik kontraproduktives Verlangen, bestand ich meine Mathe-Abiprüfung doch nur weil ich die absolute Mindestanzahl an Punkten, die mich vom Durchfallen retten sollte, einzig und ausschließlich durch das absolvieren der Geometrieübungen erreichte. Das, weil die Geometrie an sich nur Malen nach Zahlen ist, aber man beim Lösen von Gleichungen oder gar dem Absolvieren von mathematischen Beweisen schulweise gezwungen wurde betrügerische Abkürzungen, euphemistisch “Merksätze” genannt, zu benutzen und Beweisführungen mit “Definitionen” begannen, unumstößlichen, ewig wahren gar, denen ich regelmäßig mit einem “Wirklich? Warum?” begegnete und ich so von 90 Minuten Prüfungszeit 80 mit dem durchgrübeln mathematisch-philosophischen Fragen zugebracht hätte, die, zugegeben, die alten Griechen vor zweieinhalbtausend Jahren schon alle für mich gelöst hatten.Nun, nicht alle, aber die Basics standen. Die Mathematik, ursprünglich als praktische Hilfestellung zur Bewältigung alltäglicher Probleme gefunden, war mit a2+b2=c2 im Zenit ihrer Praktischheit, wenn es darum ging, einen Baum zu fällen oder eine Pyramide zu bauen. Das reine Zählen beherrschte man schon länger, weil, was ist wichtiger als zu wissen, ob der alte Papadakis dich beim letzten Schweineschlachten wieder beschissen hat und er dir jetzt vier Scheffel Gyros schuldet - oder Du ihm, weil du das Gymnasium beim gestrengen Papadopoulos, der, der noch beim Pythagoras in die Schule gegangen war, nur mit Hilfe von Kreisemalen bestanden hattest.So einfach und praktisch war die Welt der Mathematik und ihrer handfesten Schwester, der Physik, im Grunde bis ans Ende des 19. Jahrhunderts, Zahlen waren real, Planetenumlaufbahnen waren rund, die Uhr tickte in nur eine Richtung, im ewig gleichen Takt. Was Newton im Jahr 1666, per Apfelfall auf den Kopf, über unsere Welt in Erfahrung gebracht und in Gleichungen gepackt hatte, galt augenscheinlich, und mit ein bisschen Mühe konnte das jeder verstehen und überprüfen.Dann, auf einmal, kam der Herr E. aus U. und mit diesem wurde im Jahr 1905 aus absolut auf einmal relativ und aus einer wohldefinierten Welt eine Theorie, zunächst eine spezielle und bald eine allgemeine. Diese Relativitätstheorien erklärten dem interessierten Laien wie Gelehrten nun unter anderem, dass der Apfel keineswegs auf den Kopf fällt, vorausgesetzt er ist groß und die Erde schnell genug, plus ein paar andere Umstände, die zunächst in Gedankenexperimenten theoretisch und später mit Beginn des Raumfahrzeitalters praktisch belegbar waren; Schweinezüchter, Forstarbeiter und Pyramidenmaurer weltweit jedoch waren am Ende ihres Verständnis für derlei Entrücktes und Enthobenes und sprachen weise “so what?”, bevor sie ihre Drachmen weiterzählten.Ganz anders ging es ob des Unerhörten Allem, was in der Mathematik des beginnenden 20. Jahrhunderts Rang und Namen hatte. Ein gewöhnlicher Roman über die Grenzen des menschlichen Verständnis, und das ist titelgebend im Englischen der hier besprochene von Benjamin Labatut, würde mit genau diesen Mathematikern und Physikern beginnen, aber Labatut macht das und noch sehr vieles Andere anders. “When we cease to understand the world” heißt sein Buch oder vom deutschen Verlagswesen “übersetzt”, ja, wen wunderts, “Das blinde Licht: Irrfahrten der Wissenschaft”.Statt also von bass erstaunten Wissenschaftlern zu berichten werden wir von Labatut zunächst in das düsterste Kapitel des 20. Jahrhunderts geworfen und lernen wie es über ein halbes dutzend Umwege zu Zyklon B kam, dem Gift, mit dem in deutschen KZs Millionen von Menschen umgebracht wurden. Das passiert in einer Mischung aus Kuriosität und Lakonie ohne respektlos den Opfern gegenüber zu sein. Es liest sich im Grunde wie ein dichter, gut recherchierter Artikel in einem angesehenen Magazin, stellenweise wie ein, sehr kurzer, Thomas Pynchon, man staunt und lernt über Textilfärber und Alchemisten am preußischen Hof Friedrich des I. auf der Suche nach der perfekten Farbe für dessen Armeeuniformen und landet über den Umweg der Giftgastoten des ersten Weltkrieges mit Entsetzen an den Mauern der Gaskammern von Auschwitz und weiß nun warum diese Preußisch-Blau schimmern. Innen.Labatut zeigt hier, fast bevor das Buch überhaupt beginnt, ominös und clever, in beiläufigem Storytelling, dass, wenn wir über das Unverständnis gegenüber der Welt reden, wir nicht in die hinteren Kapitel Mathematischer Enzyklopädien schauen müssen. Das liegt näher. Viel näher.Ok. Ein Geständnis. Ich lese nie Klappentexte und höre bei mich interessierenden Büchern über die ich per Rezension stolpere augenblicklich auf, diese zu lesen. Aber hier war es zu spät, ich schnappte eine entscheidende Aussage über “When we cease to understand the world” auf: Labatut bezeichnet das Buch als “non-fiction novel”, alles basiere auf tatsächlichen Begebenheiten, um die er eine bestimmte Menge Fiktion geschrieben habe. Im ersten Kapitel sei es ein lausiger Absatz gewesen, der ausgedacht sei, später wäre er großzügiger geworden. Seltsamerweise, hat mir das als Spoilernazi nicht im geringsten das Vergnügen am Buch gemindert, im Gegenteil, es war der Beginn einer Schnitzeljagd nach dem Fiktiven, bewaffnet mit Google und Wikipedia hinterfrug ich zunächst jedes mir suspekte Detail - und gab alsbald auf. Es spielte irgendwie keine Rolle. Wer das Selbstvertrauen hat, einen Roman im Graubereich zwischen Realität und Fiktion mit dem Holocaust zu beginnen und nicht auf einer deutschen Anklagebank sitzt hat mein Vertrauen.Aber nur fast. Im zweiten Kapitel schreibt ein Mann namens Schwarzschild aus den Schützengräben des ersten Weltkrieges einen Brief an Albert Einstein, so erfahren wir, in dem er diesem in winziger Handschrift eine Lösung der in seiner allgemeinen Relativitätstheorie nur aufgestellten Gleichungen präsentiert. Ein ganz ungeheuerlicher Vorgang, von dem Einstein angab, ihn nicht in seiner Lebzeit erwartet zu haben, so komplex erschien der Wissenschaft die allgemeine Theorie von der Relativität. Hah! “Fakenews” grummelnd tippte ich triumphierend den Namen Schwarzschild in www.wikipedia.de - alas! - 1:0 Labatut, stimmt alles! Schwarzschild gab es, er war ein Genie, der mit seiner Lösung die Existenz Schwarzer Löcher bewiesen hatte - und fünf Monate nach dem Absenden des Briefes an Albert Einstein an den Folgen des Einatmens von Senfgas starb. Mit dieser Tatsache macht das erste Kapitel nun noch mehr Sinn und es ist nicht der letze Loop, den Labatut hier tut (ich kann nicht anders 🙄). Der Autor, geboren 1980, ist kulturell sozialisiert wie wir alle, er kennt die Mechanismen guter Netflixserien oder cleverer Comedians, die uns mit zunächst zusammenhanglosen Details verwirren, um irgendwann wieder auf diese zurück zu kommen und uns erstaunt den Kopf zu schütteln. Er konstruiert seinen Roman um zahlreiche dieser konkreten oder abstrakten, fiktiven oder nur scheinbar fiktiven Tatsachen und Begebenheiten. Er beginnt das alles in einem Stil, der oft mehr an Reportage denn Roman denken lässt und damit unserem ergebnisorientierten, oder positiv “wissbegierigen”, modernen Leseverhalten scheinbar entgegen kommt. Doch bringt er uns immer wieder ins stolpern und träumen und er wird anders enden und wir werden den Übergang nicht gemerkt haben.Im dritten Kapitel war ich mir so sicher, Labatut erwischt zu haben. Es geht um einen Japaner mit einem in Japan eher Dutzendnamen der die mathematische Vermutung a+b=c beweisen will. Verarschen kann ich mich alleine.Das Kapitel erklärt faszinierend lebendig was für eine verflixte Frage diese unscheinbaren fünf mathematischen Symbole aufwerfen, wie sich verschiedene andere japanische Mathematiker mit genauso generischen Nachnamen damit herumgeschlagen haben und dabei dem, na klar, “Grothendieck’s Fluch” erlegen seien. “Jetzt kommen noch die deutschen Fakenamen dazu”, denkt der Rezensent, der genau dieses Kapitel im Funkloch las, no wikipedia no more, in dem es um einen fantastischen Mathematiker geht, Alexander Grothendieck, der in den Sechzigern der marottigste Star des wissenschaftlichen Feldes war; jeder wollte sein wie er oder auch nur ihn lehren hören, er hatte alle am kleinen Finger. Ein Genie welches schon im Kindesalter jahrhundertealte mathematische Probleme löste und in der Hochzeit seiner Karriere das Feld revolutionierte - um sich 1973 als nahezu kleiderloser Eremit zurückzuziehen, weil er begriff, dass seine Wissenschaft und damit seine Erfolge in dieser aber auch sowas von irrelevant für die Menschen dieser Welt seien, den ökologischen Verfall des Planeten nicht aufhielten, keine Bombe weniger gebaut noch geworfen würde, nur weil er sich in homologischer Algebra auskennt. Grothendieck verstand 99% der Mathematik - und die Welt nicht mehr.Krasse Story, Herr Labatut, gut geschmiedet. Als ich wieder Empfang hatte wurde mir meine mathematische Ignoranz von Google und Wiki erwartbar um die Ohren gehauen. Alles war grundlegend wahr, das so trivial klingende Theorem a+b=c beschäftigt Mathematiker seit Jahrzehnten, alle handelnden Personen sind real und haben in etwa die erzählte Geschichte. Die Welt der Mathematiker ist eine wahnwitzige und eine der Wahnsinnigen, wer hätte das gedacht.Aber ist das verwunderlich? Während Maurermeister Muhammad in seinem Garten Pyramiden baut und den Satz des Pythagoras beherrscht, weswegen die Dinger, unter Wasser, in Jahrtausenden noch stehen werden, schreibt der Mathematiker László Lovász Perfekte-Graphen-Sätze und muss dann zugeben, dass die nur schwach sind. Die Sätze? Die Graphen? Who knows. Wozu sind die gut? Für Strukturen, wie sie bei der Eckenfärbung auftreten. Auch in Preußisch-Blau?Muhammad tangiert solch abgehobener Unsinn nicht, nicht beim Pyramidenbau. Aber abends, wenn er sich die Tabulé abwischt und sich über die Welt Gedanken macht, kommt er unweigerlich im Jahr 1926 an.War Albert Einsteins allgemeine Relativitätstheorie mit ihren scheinbaren Paradoxen im miteinander von Raum und Zeit für Muhammad verstehbar, trat in diesem Jahr der ambivalente Katzenliebhaber S. auf und sperrte das Objekt seiner Liebe in eine Kiste, deren Beobachtung er zunächst verbot.Einstein war aufgefallen, dass an Newtons Mechanik nicht alles rund lief und kam mit der Einbeziehung der vierten Dimension - der Zeit - der Sache so nahe, dass selbst hundert Jahre später die Theorie für die Praxis, von A wie Atombombe über G wie GPS bis zum Z auf dem Panzer im Donbass exakt tut, was sie soll. Schrödinger auf einem Kongress in München im Jahr 1926 jedoch fand ein Problem. Wenn man die Bewegungen von Atomen und deren Bestandteile berechnen will - und wer will das nicht? - funktionieren die aktuellen mathematischen Modell nicht. Ein neues muss her!“Teilchen”, so Schrödinger, “sind eigentlich Wellen!”“Und meine Pyramide im Garten ist Gott”, frevelt Muhammad in seinen Bart, “Blumen sind Tiere, Menschen sind Bücher, Schöne hässlich und Reiche arm”, rieb er sich verzweifelt die Augen und geht zu Bett.Wie Schrödinger seine Theorie auf der Bühne des Mathematikerkongress mit Gleichungen unterlegte kam ein junger Student mit Namen Heisenberg auf dieselbe und machte einen Will Smith, wischte buchstäblich Schrödingers Formeln von der Tafel und sprach, sinngemäß: “Nimm nie wieder das Wort Realität in dem Mund! Dein Modell is all b******t, man kann sich die Welt der Atome nicht vorstellen wie sie ist! Man kann sie sich gar nicht vorstellen!” (Und wurde, anders als Herr Smith, prompt rausgeworfen.)Waren es bei Newton noch Steine oder, gottlob Äpfel, die die Welt formten und bei Einstein noch greifbare Atome plus ein wenig Zeit, bei Schrödinger wenigstens noch Wellen und Teilchen, blieb bei Heisenberg nur noch Unschärfe. Nicht nur kann man Atome nicht beobachten, man kann sie noch nicht mal beschreiben, ja man solle sie sich noch nicht einmal vorstellen. Sobald man begänne, sich ein Elektron vorzustellen, dass um ein Proton kreist liege man schon falsch. Alles was man von der Welt wissen könne sind Wahrscheinlichkeiten. Erst wenn man diese messe erscheinen sie, wie von Gott geschaffen, durch die Messung selbst. Man könne sogar entscheiden, was erschaffen würde. Messe man die Eigenschaften einer Welle, so erscheine eine Welle - messe man die Eigenschaften eines Teilchens, so erscheine dieses. Wo und in welcher Geschwindigkeit dieses existiert ist dann jedoch auch wieder nicht feststellbar, man muss sich entscheiden, misst man die Masse des Teilchens, verliert man die Möglichkeit dessen Geschwindigkeit zu messen und umgekehrt. Misst man dann die Masse bekommt man jedoch keine eindeutige Zahl, zwei Kilo Kartoffeln, man bekomme eine Wahrscheinlichkeit, wie auf einem Wiener Biomarkt sind es am Ende nur drei Pfund Erdäpfel, die Hälfte wahrscheinlich schon verschimmelt!Labatut beschreibt, dass Schrödinger wie Heisenberg ob ihrer Erkentnisse hilflos verrückt geworden seien, zumindest zeitweise, und obwohl diese Episoden belegt sind, findet hier die Fiktion im Buch ihr zuhause: Schrödinger kommt der Kindschändung verdammt nahe und Heisinger trinkt Absynth, phantasiert und masturbiert. Labatut findet auch hier eine beeindruckende Sicherheit dem Leser die Krassheit der Entrückung nahezubringen, den Blick in den Abgrund, den beide Männer warfen und was das mit einem macht. Es ist geradeso düster, dass man die Konsequenz versteht, geradeso aushaltbar, dass man zurück findet zum Thema, wie die beiden Wissenschaftler zu ihrem.Das Thema ist: Muss das alles sein?Der Mensch sucht nach Sinn in der Welt, das unterscheidet ihn vom Tier. Es hält ihn bei der Stange, das kleine Menschchen, so unterlegen er körperlich auch ist, diese Suche nach dem Sinn macht ihn zum Überlebenden. Wenn Du etwas hast, wofür du lebst, bist du schneller als der Tiger der aus dem Busch springt, klüger als ein Virus, dass Du dir beim Fledermausemahl eingefangen hast und brutaler in deinem Vernichtungswillen als jeder Dodo und jedes Mammut. Du magst falsch liegen mit dem lustigen Gott mit dem Elefantenkopf, mit dem beeindruckenden Gott mit den Blitzen, mit dem eher lamen Gott, der sich an ein Holzkreuz tackern ließ, aber alle drei gaben dir die Kraft deinen Brüdern im Zweifel den Schädel einzuschlagen, wenn Sie dir den Hummus aus der Pita klauen.Dann kam die Renaissance und die Aufklärung und obwohl etwas prosaisch und abstrakt und nicht mehr ganz so funny gab sie dir ein klareres Bild von der Welt. Und Kohle! Und Fortschritt! Und etwas gegen die Pusteln nach dem Besuch im Puff! Und Speed! Und die Mutter, die sich beklagt, dass Du Sie zu selten anrufst! Dafür lohnte es sich den Giftgaskanister in die richtige Windrichtung zu öffnen. Abwurf der H-Bomb nicht unter 9000m! Ist der Virenscanner aktuell?Was passiert, ist die latente Frage, wenn wir zwei Wissenschaftler haben, Bohr und Heisenberg, die nicht nur eine Theorie entwickeln, dass alles was wir sehen inherent unwahr ist, schlimmer, nicht erkennbar und, schlimmer, diese Theorie belegen, so klar und eindeutig, dass nicht nur Einstein darob verzweifelte, schlimmer, die uns über diese Theorie sagen: “Wir betrachten die Quantenmechanik als eine geschlossene Theorie. Die ihr zugrunde liegende Mathematik und Physik sind nicht mehr veränderbar”. Ein Kopfschuss für jeden, der nach Erkenntnis sucht.Darum geht es in Benjamin Labatuts Buch “When we cease to understand the world”. “Wenn wir aufhören die Welt zu verstehen” ist dabei ein zu schwacher Titel, denn verstanden haben wir diese noch nie. Aber wir haben es versucht. Manchmal dumm, manchmal lustig, in der Rückschau oft brutal und nicht in deren oder unserem bestem Interesse. Aber was wir seit Bohr und Heisenberg tun, ist uns zu beweisen, dass wir diese nicht verstehen können werden. (Dass dieser Satz im Deutschen die grammatikalische Form “Futur II” hat, beendet die Diskussion darüber, ob die Deutschen Humor haben.)Wie und ob wir, die Menschheit, damit leben können ist die offensichtlichste Frage und dass uns Benjamin Labatut in “When we cease to understand the world” in brillanter Art und Weise darob aufrüttelt, ist dieses Buch zu lesen wert. Und mit dem Fakt, dass alle dem Wahn und der Depression verfallenen Protagonisten zumindest in der Fiktion des Buches wieder und klüger aus dieser entstiegen, will uns vielleicht etwas sagen, sage ich leise hoffnungsvoll. This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit lobundverriss.substack.com

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Großer Astronom vor 110 Jahren geboren - Martin Schwarzschild und der erste Astronomie-Ballon

Sternzeit - Deutschlandfunk

Play Episode Listen Later May 30, 2022 2:32

Morgen vor 110 Jahren kam in Potsdam Martin Schwarzschild zur Welt. Er trat in die Fußstapfen seines Vaters Karl, der einer der größten Astronomen des vergangenen Jahrhunderts war.Von Dirk Lorenzenwww.deutschlandfunk.de, SternzeitDirekter Link zur Audiodatei

er welt erste jahrhunderts ballon geboren astronomie astronomen schwarzschild

Edicion Limitada - 2 de Mayo del 2022 (Partes 1 y 2)

Three in Five - an SLC Management podcast

Play Episode Listen Later May 3, 2022 365:20

Edición Limitada - 2 de Mayo del 2022 (Partes 1 y 2). Producción, realización y conducción: Gustavo Verduzco. Presentando música de MORE, Matthias & Marss, The Mystic Underground, Machine Made Pleasure, Kapitalet, Social Ambitions, X Marks The Pedwalk, Dark-O-Matic, Provision, Nórdika, Reflection, Vogon Poetry, Book Of Love, Channel 69 con Dania Morales, Duran Duran, The Rude Awakening, Front 242, Leaether Strip, Alien Skin, J:Dead, Ashbury Heights con Madil Hardis, Orange Sector, Electronic Frequency, Holocoder, Schwarzschild, Kim Lunner, ES23, Cold Connection, Solitary Experiments, Sacred Skin, Corlyx con Massive Ego, Beyond Border, Beyond Border, Beyond Border, Technolorgy, Eric C. Powell & Andrea Powell, LAU, The Midnight, Michael Oakley, Fused, Purwien & Kowa, Orchestral Manoeuvres in the Dark, Eminent Sol, Pet Shop Boys, T-4-2, h/p, Positronic, Raindancer, Alanas Chosnau & Mark Reeder, Current One, Dani Tamayo, Apres La Nuit, Esoterik, X Marks The Pedwalk, Am Tierpark, Tempers, Sonar 4, SDH (Semiotics Department Of Heteronyms), Simon Carter and Fabsi, Minuit Machine, Aesthetische, Tension Control y Suicide Commando.

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Communion After Dark - Episode 3/28/22

Communion After Dark

Play Episode Listen Later Mar 28, 2022 134:49

Monday, Mar 28, 2022: Communion After Dark -- featuring the latest and best in alternative-electronic music -- with music from Stabbing Westward, Schwarzschild, Auger, Skinny Puppy and more.

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51 | All About Black Holes

Science We Speak

Play Episode Listen Later Mar 6, 2022 22:50

Black holes are one of the unsolved mysteries of our universe. Here are all the essentials you need to know about black holes.Keywords: Albert Einstein, Stephen Hawking, Hawking Radiation, Chandrasekhar Limit, Kip Thorne, Interstellar, John Michell, Lemaitre, Laplace, Oppenheimer, Schwarzschild radius.Highlights: (01:36) Books,(02:23) Introduction to black holes,(03:37) History of black holes,(07:56) Image of a black hole,(11:07) Types of black holes,(13:27) Primordial black holes,(15:42) Hawking Radiation,(16:56) Energy extraction,(18:57) No-hair Theorem,(19:57) Collision of two black holes.SUPPORT: **Patreon: https://www.patreon.com/ScienceWeSpeakSOCIAL MEDIA: *Instagram: https://www.instagram.com/sciencewespeak/*Facebook: https://www.facebook.com/ScienceWeSpeak*Telegram: https://t.me/sciencewespeak

Episode 36: Sarah Schwarzschild on the expanded opportunity set in real estate

Play Episode Listen Later Feb 2, 2022 8:33

Sarah Schwarzschild, Managing Director and Co-Head of BGO Strategic Capital Partners at BentallGreenOak, discusses trends in the primary, secondary and co-investing real estate space. The information in this podcast is not intended to provide specific financial, tax, investment, insurance, legal or accounting advice and should not be relied upon and does not constitute a specific offer to buy and/or sell securities, insurance or investment services. Investors should consult with their professional advisors before acting upon any information contained in this podcast. To review the transcript and disclosure for this podcast, please visit: https://www.slcmanagement.com/en/insights/podcasts/three-in-five-episode-36-sarah-schwarzschild

opportunities real estate managing directors investors expanded co head schwarzschild bentallgreenoak

Buraco negro: classificação

CosmoTeo

Play Episode Listen Later Dec 1, 2021 33:41

Há muito material sobre RG (Relatividade Geral) em português na internet. Selecionei alguns que considero mais simples para entendimento: * Excelente texto sobre a teoria do Big Bang e os 100 anos da RG pelo prof. Roberto Covolan: https://www.cristaosnaciencia.org.br/a-teoria-do-big-bang-e-os-100-anos-da-relatividade-geral/ * Texto da Brasil Escola: https://brasilescola.uol.com.br/fisica/teoria-relatividade-geral.htm * Texto da Revista A Física na Escola sobre os 100 anos da RG: http://www1.fisica.org.br/fne/phocadownload/Vol14-Num1/fne-14-1-a081.pdf * Artigo da Revista Brasileira de Ensino de Física: https://www.scielo.br/j/rbef/a/G5zC7L9qcKg6vZdTXmmWyGm/?format=pdf&lang=pt * Artigo da Revista A Física na Escola: http://www1.fisica.org.br/fne/phocadownload/Vol19-Num2/FNE-19-1-201205.pdf * Um pouco de história da Relatividade Especial: https://www.if.ufrgs.br/public/tapf/v24_n2_melina.pdf * Um livro gratuito, em português e muito bom sobre astronomia a cosmologia (usarei-o em diversos episódios): http://astro.if.ufrgs.br/livro.pdf Para saber mais sobre buraco negro, veja na Wikipédia em português. Está relativamente boa e sem grandes problemas: * Toda a história: https://pt.wikipedia.org/wiki/Buraco_negro#Propriedades_e_estrutura * Raio de Schwarzschild: https://pt.wikipedia.org/wiki/Raio_de_Schwarzschild Não deixe de acompanhar os artigos do CosmoTeo no Hora de Berear: https://horadeberear.com.br/category/cosmologia-e-teologia/ Contato comigo pelo Instagram: @alexandre.fernandes.df Ou pelo linktree: https://linktr.ee/alexandre.fernandes.df --- Send in a voice message: https://anchor.fm/alexandre-fernandes-df/message

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021 - El Universo en un Agujero Negro

Universo de Misterios

Play Episode Listen Later Oct 17, 2021 21:16

Mi afirmación de que "todos los agujeros negros, rotan" estaba referida a los agujeros negros supermasivos que se supone existen en los núcleos galácticos de muchas galaxias. Creo que no lo expresé así, por lo que añado aquí la aclaración: Según su carga y momento angular, los agujeros negros pueden ser de varios tipos: El agujero negro más sencillo posible es el agujero negro de Schwarzschild, que no rota ni tiene carga. Si no gira pero posee carga eléctrica, tenemos el llamado agujero negro de Reissner-Nordstrøm. Si rota pero no tiene carga es un agujero negro de Kerr. Y si posee rotación y carga, hablamos de un agujero negro de Kerr-Newman. Gracias por hacer el comentario!!!

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Schwarzschild Radius: Building a Black Hole

The Astrophysics Academy: Just A Minute

Play Episode Listen Later Jul 17, 2021 1:27

In just 75 seconds, learn about the radius at which any object can become a black hole, even you!

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Episode (142) Sci-Fi Short Film THE SCHWARZSCHILD RADIUS

Eye On Sci-Fi Podcast

Play Episode Listen Later Jun 28, 2021 5:32

Sci-Fi short THE SCHWARZSCHILD RADIUS is the poignant story of an astronaut whose ship is trapped by the gravity of a black hole. Knowing his demise is imminent, he records a final message for his young son on earth. This film is the latest offering by director Pete Majarich.EPISODE LINKSTHE SCHWARZSCHILD RADIUS - The 7th Matrix Spotlight: https://www.the7thmatrix.com/blog/2021/6/27/the-schwarzschild-radius-pete-majarichOther Sci-Fi Shorts By Pete Majarich: INVASION https://www.the7thmatrix.com/blog/2020/7/26/stunning-sci-fi-short-invasion-pete-majarichTHE VISITOR https://www.the7thmatrix.com/blog/2018/11/11/mars-sci-fi-short-film-the-visitorSupport the EYE ON SCI-FI Podcast & The 7th Matrix: https://the7thmatrix.com/support or directly via PayPal: https://paypal.me/the7thmatrixor Cash App: https://cash.app/$The7thMatrixSignup For The 7th Matrix Newsletter: http://bit.ly/31QnInnFollow The 7th Matrix On Twitter: https://twitter.com/the7thMatrixFollow The 7th Matrix On Instagram: https://instagram.com/the7thMatrixPodcast Intro music: "I Succumb" by António Bizarrohttps://freemusicarchive.org/music/Antnio_Bizarro/City_of_Industry_Slow_Gun/Member of the WhatPods podcasting community: https://whatpods.com.

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#74: Let's Talk About Black Holes

Tinfoil Radio

Play Episode Listen Later Jun 24, 2021 66:41

This week is another great example of why Weird Summer is so fun! Today we'll be talking about how the Earth was sucked into a black hole and the world actually ended in 2012. Let's get into it! FOLLOW US https://twitter.com/tinfoil_radio https://www.facebook.com/tinfoilradio MERCH https://www.teepublic.com/user/tinfoilradio TYLER'S MUSIC https://theamazingt-bird.bandcamp.com JAKE'S MUSIC https://open.spotify.com/artist/442gQadsmNitWpSSrwYGpv SOURCES https://www.popularmechanics.com/science/environment/a34166354/black-hole-center-of-earth-fake-study/ https://www.popularmechanics.com/culture/g29365567/conspiracy-theories/?utm_campaign=arb_%20parameter https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6910781/ https://home.cern/science/physics/higgs-boson https://www.youtube.com/watch?v=2v4I6-sE_Cg https://medium.com/conspiracy-custard/the-world-ended-in-2012-ca344c629462 https://en.wikipedia.org/wiki/Schwarzschild_radius --- This episode is sponsored by · Anchor: The easiest way to make a podcast. https://anchor.fm/app

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2019 Was the Best Year of Our Lives (feat. Sarah Schwarzschild)

Peaking

Play Episode Listen Later Jun 3, 2021 45:24

This week, Jess is chatting with one of her best friends, Sarah Schwarzschild, about peaking through major life changes - which, for both of them, hit an all-time high in 2019. They discuss all things from breakups to exploring your sexual identity to the elusive concept of a "happiness plateau." Also, astrology. Sarah is a licensed Family Nurse Practitioner working in the community health space. She cares for patients of all ages and backgrounds, and is particularly passionate about LGBTQ+ health. Peaking is honored to have her as our first guest to kick off Pride Month! www.peakingpodcast.com IG: @peakingpodcast Intro/Outro Music: "Have Mercy On Us" by Air Kid --- This episode is sponsored by · Anchor: The easiest way to make a podcast. https://anchor.fm/app --- Send in a voice message: https://anchor.fm/peakingpodcast/message

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2019 Was the Best Year of Our Lives (feat. Sarah Schwarzschild)

Peaking

Play Episode Listen Later Jun 3, 2021 45:24

This week, Jess is chatting with one of her best friends, Sarah Schwarzschild, about peaking through major life changes - which, for both of them, hit an all-time high in 2019. They discuss all things from breakups to exploring your sexual identity to the elusive concept of a "happiness plateau." Also, astrology. Sarah is a licensed Family Nurse Practitioner working in the community health space. She cares for patients of all ages and backgrounds, and is particularly passionate about LGBTQ+ health. Peaking is honored to have her as our first guest to kick off Pride Month! www.peakingpodcast.com IG: @peakingpodcast Intro/Outro Music: "Have Mercy On Us" by Air Kid --- This episode is sponsored by · Anchor: The easiest way to make a podcast. https://anchor.fm/app --- Send in a voice message: https://anchor.fm/peakingpodcast/message

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SHIMON SCHWARZCHILD

One Planet Podcast

Play Episode Listen Later Jun 1, 2021

Shimon "Bert" Schwarzschild (born 1925) is an environmental activist and humanitarian. His work contributed to the establishment of a nature preserve in Assisi, Italy. Schwarzschild founded the Assisi Bird Campaign and helped organize the Assisi Nature Council and Action for Nature. He has also been active on many other environmental and neighborhood issues.Schwarzschild's activism has received news coverage regionally, nationally, and internationally. He is listed in the World Who's who and Does what in Environment & Conservation.· www.shimonschwarzschild.com· www.creativeprocess.info

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(Highlights) SHIMON SCHWARZCHILD

One Planet Podcast

Play Episode Listen Later Jun 1, 2021

“I witnessed being totally rejected and not only witnessed, I remembered as a ten-year old all the children would go to a class in eugenics that I was not allowed to go to. I remember the insults that children learned against Jews while I was still in Germany. And I'm one of the lucky Jews who managed to leave.”Shimon "Bert" Schwarzschild (born 1925) is an environmental activist and humanitarian. His work contributed to the establishment of a nature preserve in Assisi, Italy. Schwarzschild founded the Assisi Bird Campaign and helped organize the Assisi Nature Council and Action for Nature. He has also been active on many other environmental and neighborhood issues.Schwarzschild's activism has received news coverage regionally, nationally, and internationally. He is listed in the World Who's who and Does what in Environment & Conservation.· www.shimonschwarzschild.com· www.creativeprocess.info

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#1127 : Détection d'une étoile très proche de Sgr A* par GRAVITY

Ã‡a Se Passe LÃ -Haut

Play Episode Listen Later Jan 29, 2021 7:34

Ces deux dernières années, des effets relativistes à proximité immédiate de Sgr A* - redshift gravitationnel et précession de Schwarzschild- ont été mesurés grâce à une étoile qui s'en approche de près, l'étoile S2. Aujourd'hui, la collaboration GRAVITY publie la détection d'une étoile très faible et extrêmement proche du trou noir supermassif, faisant d'elle un potentiel outil fondamental pour son étude détaillée. L'étude est publiée dans Astronomy & Astrophysics.

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God's Justice

Back2God Podcast

Play Episode Listen Later Nov 11, 2020 34:09

“Speak up for those who cannot speak for themselves, for the rights of all who are destitute. Speak up and judge fairly; defend the rights of the poor and needy.” – Proverbs 31:8-9 In his article in the Encyclopedia Judaica on justice, Rabbi Steven S. Schwarzschild contrasts the Jewish approach to justice with dominant Western definitions, which are primarily retributive or distributive — that is, systems for how to do things. In contrast, Jewish justice is a substantive vision of what human life should be. “The substantive view of justice is concerned with the full enhancement of human and, above all, social life,” Schwarzschild wrote. “Thus it suffuses all human relations and social institutions.”

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Edicion Limitada - 26 de Octubre del 2020

Play Episode Listen Later Oct 27, 2020 203:39

Edición Limitada - 26 de Octubre del 2020. Producción, realización y conducción: Gustavo Verduzco. Presentando música de The Outfield, X-Perience, Alvarez & Heppner, Unheilig, Renard, Daniel Hall, Zoodrake, Schwarzschild, Fonohead, Rupesh Cartel, Janosch Moldau, darwinmcd con Mark Bebb, Mr.Kitty, Scheuber con Wollank, Transcendent 7, Aeronaut V, Les Anges De La Nuit, Korine, Priest, New Order, N-Frequency, Uncreated con Dennis Schober, Reichsfeind, Sea Of Sin, Digital Energy y Endzustand.

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Synthentral 20200929 New Tunesday

Play Episode Listen Later Sep 29, 2020 123:50

New Tunesday: new releases from the last week! Give the bands a listen and if you like what you hear then support the bands! Buy their music! Like their social media pages! Watch their live streams! Today's episode features new releases by She's Got Claws, Klonavenus, Dissonance, Misfortunes, Negant, Slow Danse With The Dead, Panther Modern, Capsules Of Energy, Deadlife (feat. Tessa Hedrick), Ashbury Heights, London Sadness, Schwarzschild, Train To Spain, Kontrollenhet, Black Needle Noise (feat. John Fryer & Tom Berger), Delphine Coma, PreEmptive Strike 0.1, Moonrunner83 (feat. Kyle Craig), Twist Helix, Uncreated, Dimitri Berzerk, Das Mörtal, Monsieur Desastreux, Don't Get Lemon, Twitch, Michael Kross (feat. The Last Years), Brutalist Architecture In The Sun, We The North, 11Grams, and Les Anges De La Nuit!

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Synthentral 20200929 New Tunesday

Play Episode Listen Later Sep 29, 2020 123:50

New Tunesday: new releases from the last week! Give the bands a listen and if you like what you hear then support the bands! Buy their music! Like their social media pages! Watch their live streams! Today's episode features new releases by She's Got Claws, Klonavenus, Dissonance, Misfortunes, Negant, Slow Danse With The Dead, Panther Modern, Capsules Of Energy, Deadlife (feat. Tessa Hedrick), Ashbury Heights, London Sadness, Schwarzschild, Train To Spain, Kontrollenhet, Black Needle Noise (feat. John Fryer & Tom Berger), Delphine Coma, PreEmptive Strike 0.1, Moonrunner83 (feat. Kyle Craig), Twist Helix, Uncreated, Dimitri Berzerk, Das Mörtal, Monsieur Desastreux, Don't Get Lemon, Twitch, Michael Kross (feat. The Last Years), Brutalist Architecture In The Sun, We The North, 11Grams, and Les Anges De La Nuit!

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Synthentral 20200929 New Tunesday

@mediasres - Deutschlandfunk

Play Episode Listen Later Sep 29, 2020 123:50

New Tunesday: new releases from the last week! Give the bands a listen and if you like what you hear then support the bands! Buy their music! Like their social media pages! Watch their live streams! Today's episode features new releases by She's Got Claws, Klonavenus, Dissonance, Misfortunes, Negant, Slow Danse With The Dead, Panther Modern, Capsules Of Energy, Deadlife (feat. Tessa Hedrick), Ashbury Heights, London Sadness, Schwarzschild, Train To Spain, Kontrollenhet, Black Needle Noise (feat. John Fryer & Tom Berger), Delphine Coma, PreEmptive Strike 0.1, Moonrunner83 (feat. Kyle Craig), Twist Helix, Uncreated, Dimitri Berzerk, Das Mörtal, Monsieur Desastreux, Don't Get Lemon, Twitch, Michael Kross (feat. The Last Years), Brutalist Architecture In The Sun, We The North, 11Grams, and Les Anges De La Nuit!

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Leopold Schwarzschild - Aufklärung aus dem Exil

Play Episode Listen Later Sep 10, 2020 5:26

Leopold Schwarzschild hatte das "Dritte Reich" früh kommen sehen und warnte in seiner Zeitschrift "Das Tage-Buch" vehement. Nach der Machtergreifung Hitlers arbeitete er aus dem Exil und wurde auch im Ausland geschätzt - unter anderem von Winston Churchill. Von Brigitte Baetz www.deutschlandfunk.de, @mediasres Hören bis: 19.01.2038 04:14 Direkter Link zur Audiodatei

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Edicion Limitada - 18 de Mayo del 2020

Play Episode Listen Later May 19, 2020 253:40

Edición Limitada - 18 de Mayo del 2020. Producción, realización y conducción: Gustavo Verduzco. Presentando música de The Stranglers, Nina con Lau, The Midnight, Fused, Church of Trees, Nation of Language, Italoconnection, Eurotix, Humans Can't Reboot, Radiohimlen, Neekoh, Vandal Moon, Synthax Xtructure, Lemonade Kid con Ortense Blue, Celluloide, Jigsaw Sequence, Black Nail Cabaret, Avoid-A-Void, She Past Away, Spray, ETH, Schwarzschild, Uncreated con Robert Enforsen, Panic Priest, Saigon Blue Rain, Costume, She Hates Emotions, Technolorgy, Cyferdyne, Nine Seconds, Menschdefekt, Pandoria, Ginger Snap5 y Robert Görl & DAF.

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Synthentral 20200519 New Tunesday

Play Episode Listen Later May 18, 2020 126:48

New Tunesday: new releases from the last week! Futurepop, Synthpop, EBM, Industrial, Post-Punk, Darkwave, Dark Electro, Synthwave, and more! Give the bands a listen and if you like what you hear then support the bands! Buy their music! Like their social media pages! Go see them on tour! Today's episode features new releases by Schwarzschild, Acid Fader, Formato Negativo, Rayne Reznor, smilegroup, skimode, The Grey Disorder, Jigsaw Sequence, VDevil, Cassetter, Carpenter Brut & Yann Ligner, Vandal Moon, Matthias & Marss, Avoid-A-Void, ReveLever, Neon Nox, GlitterWølf, She Hates Emotions, Comaduster, DI_ove & Leæther Strip, Analogue Electronic Whatever, Daniel Deluxe, Auger, Positronic, Egoist, Crystalline Stricture, Meteor, CZARINA & Straplocked, Conscience, Batch ID, Mari Kattman, and Terrordyne!

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Synthentral 20200519 New Tunesday

Play Episode Listen Later May 18, 2020 126:48

New Tunesday: new releases from the last week! Futurepop, Synthpop, EBM, Industrial, Post-Punk, Darkwave, Dark Electro, Synthwave, and more! Give the bands a listen and if you like what you hear then support the bands! Buy their music! Like their social media pages! Go see them on tour! Today's episode features new releases by Schwarzschild, Acid Fader, Formato Negativo, Rayne Reznor, smilegroup, skimode, The Grey Disorder, Jigsaw Sequence, VDevil, Cassetter, Carpenter Brut & Yann Ligner, Vandal Moon, Matthias & Marss, Avoid-A-Void, ReveLever, Neon Nox, GlitterWølf, She Hates Emotions, Comaduster, DI_ove & Leæther Strip, Analogue Electronic Whatever, Daniel Deluxe, Auger, Positronic, Egoist, Crystalline Stricture, Meteor, CZARINA & Straplocked, Conscience, Batch ID, Mari Kattman, and Terrordyne!

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Synthentral 20200519 New Tunesday

Coffee Break: Señal y Ruido

Play Episode Listen Later May 18, 2020 126:48

New Tunesday: new releases from the last week! Futurepop, Synthpop, EBM, Industrial, Post-Punk, Darkwave, Dark Electro, Synthwave, and more! Give the bands a listen and if you like what you hear then support the bands! Buy their music! Like their social media pages! Go see them on tour! Today's episode features new releases by Schwarzschild, Acid Fader, Formato Negativo, Rayne Reznor, smilegroup, skimode, The Grey Disorder, Jigsaw Sequence, VDevil, Cassetter, Carpenter Brut & Yann Ligner, Vandal Moon, Matthias & Marss, Avoid-A-Void, ReveLever, Neon Nox, GlitterWølf, She Hates Emotions, Comaduster, DI_ove & Leæther Strip, Analogue Electronic Whatever, Daniel Deluxe, Auger, Positronic, Egoist, Crystalline Stricture, Meteor, CZARINA & Straplocked, Conscience, Batch ID, Mari Kattman, and Terrordyne!

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Ep264: Física de Wolfram; Antimateria; Parkinson; Dinosaurios; Precesión de Schwarzschild

Play Episode Listen Later Apr 23, 2020 206:11

La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Cumplimos 5 años (min 5:00); Precesión de Schwarzschild y el agujero negro supermasivo de nuestra galaxia (12:00); Enfermedad de Parkinson (32:30); El esqueleto del espinoforosaurio (1:18:00); Adiós a Teresa Rodrigo (1:38:00); Violación de simetría CP en neutrinos (1:46:00); La física de Stephen Wolfram (2:19:00). En la foto, de arriba a abajo y de izquierda a derecha: Sara Robisco, Héctor Socas, Alberto Aparici, Ignacio Crespo, 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.

Ep264: Física de Wolfram; Antimateria; Parkinson; Dinosaurios; Precesión de Schwarzschild

Coffee Break: Señal y Ruido

Play Episode Listen Later Apr 23, 2020 206:11

La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Cumplimos 5 años (min 5:00); Precesión de Schwarzschild y el agujero negro supermasivo de nuestra galaxia (12:00); Enfermedad de Parkinson (32:30); El esqueleto del espinoforosaurio (1:18:00); Adiós a Teresa Rodrigo (1:38:00); Violación de simetría CP en neutrinos (1:46:00); La física de Stephen Wolfram (2:19:00). En la foto, de arriba a abajo y de izquierda a derecha: Sara Robisco, Héctor Socas, Alberto Aparici, Ignacio Crespo, 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.

Gündem 101 - 2020/16

Bilim 101

Play Episode Listen Later Apr 17, 2020 39:56

Bulunduğumuz haftanın bilim dünyasından önemli gelişmeleri sizler için derledik. Hydroxychloroquine: small effects in mild disease. https://www.nature.com/articles/s41577-020-0315-4 How COVID-19 could ruin weather forecasts and climate records. https://www.nature.com/articles/d41586-020-00924-6 The projected timing of abrupt ecological disruption from climate change. https://www.nature.com/articles/s41586-020-2189-9 An engineered PET depolymerase to break down and recycle plastic bottles. https://www.nature.com/articles/s41586-020-2149-4 Deep CO2 in the end Triassic Central Atlantic Magmatic Province. https://www.nature.com/articles/s41467-020-15325-6 Neutrinos could shed light on why the Universe has so much more matter than antimatter. https://www.nature.com/articles/d41586-020-01022-3 Detection of the Schwarzschild precession in the orbit of the star S2 near the Galactic centre massive black hole. https://www.eso.org/public/archives/releases/sciencepapers/eso2006/eso2006a.pdf An extremely energetic supernova from a very massive star in a dense medium. https://www.nature.com/articles/s41550-020-1066-7 Intracranial effects of microgravity: A prospective longitudinal MRI study. https://pubs.rsna.org/doi/10.1148/radiol.2020191413 The gut brain axis mediates sugar preference. https://www.nature.com/articles/s41586-020-2199-7 The gut microbiome: an unexpected player in cancer immunity. https://www.sciencedirect.com/science/article/abs/pii/S0959438819301096?via%3Dihub Injured adult neurons regress to an embryonic transcriptional growth state. https://www.nature.com/articles/s41586-020-2200-5 White matter hyperintensities mediate the association of nocturnal blood pressure with cognition. https://n.neurology.org/content/early/2020/04/15/WNL.0000000000009316 An in vivo platform to select and evolve aggregation resistant proteins. https://www.nature.com/articles/s41467-020-15667-1 Minimum epistasis interpolation for sequence function relationships. https://www.nature.com/articles/s41467-020-15512-5 This might be the longest creature ever seen in the ocean. https://www.nytimes.com/2020/04/14/science/longest-animal-ocean.html Bize 101.podcast.info@gmail.com adresinden ulaşabilirsiniz.

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Synthentral 20200207 Flashback Friday

Play Episode Listen Later Feb 7, 2020 121:50

Synthentral 20200207 Flashback Friday Flashback Friday: songs anywhere from 1978 to 2018! Futurepop, Synthpop, EBM, Industrial, Darkwave, Synthwave, and so much more! Give the bands a listen and if you like what you hear then support the bands! Buy their music! Like their social media pages! Go see them on tour! Today's episode features music by Schwarzschild, Position Parallèle, Noise Resistance, Synths Versus Me, Zone Tripper, Technoid, Invisible Limits, Rector Scanner, Holm/Mirland, Libra, Mental Minority, Shadows & Mirrors, CONFORMCO, Raindancer, Electronic, Haberdashery, Nitzer Ebb, Empty, Vox Celesta, New Order, Code 64, GlitterWølf, Gradual Hate, Wave In Head, Cosmicity, The Girl & The Robot, and Client!

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Synthentral 20200207 Flashback Friday

Play Episode Listen Later Feb 7, 2020 121:50

Synthentral 20200207 Flashback Friday Flashback Friday: songs anywhere from 1978 to 2018! Futurepop, Synthpop, EBM, Industrial, Darkwave, Synthwave, and so much more! Give the bands a listen and if you like what you hear then support the bands! Buy their music! Like their social media pages! Go see them on tour! Today's episode features music by Schwarzschild, Position Parallèle, Noise Resistance, Synths Versus Me, Zone Tripper, Technoid, Invisible Limits, Rector Scanner, Holm/Mirland, Libra, Mental Minority, Shadows & Mirrors, CONFORMCO, Raindancer, Electronic, Haberdashery, Nitzer Ebb, Empty, Vox Celesta, New Order, Code 64, GlitterWølf, Gradual Hate, Wave In Head, Cosmicity, The Girl & The Robot, and Client!

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Synthentral 20200207 Flashback Friday

google earth living legends shimon schwarzschild

Play Episode Listen Later Feb 7, 2020 121:50

Synthentral 20200207 Flashback Friday Flashback Friday: songs anywhere from 1978 to 2018! Futurepop, Synthpop, EBM, Industrial, Darkwave, Synthwave, and so much more! Give the bands a listen and if you like what you hear then support the bands! Buy their music! Like their social media pages! Go see them on tour! Today's episode features music by Schwarzschild, Position Parallèle, Noise Resistance, Synths Versus Me, Zone Tripper, Technoid, Invisible Limits, Rector Scanner, Holm/Mirland, Libra, Mental Minority, Shadows & Mirrors, CONFORMCO, Raindancer, Electronic, Haberdashery, Nitzer Ebb, Empty, Vox Celesta, New Order, Code 64, GlitterWølf, Gradual Hate, Wave In Head, Cosmicity, The Girl & The Robot, and Client!

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SupaTea does a brief interview of Shimon Schwarzschild a living legend

SupaTea

Play Episode Listen Later Nov 16, 2019 6:07

A brief interview with Living Legend Shimon Schwartzchild. He is a famous environmentalist who has been fighting for Earth and its inhabitants healthy living for decades. Look him up. Google him he is extraordinary. What a gift to spend time with him. --- Support this podcast: https://anchor.fm/SupaTea/support

The Growing Industry of Homeland Security, with Danny Goodwin and Edward Schwarzschild

UAlbany News Podcast

Play Episode Listen Later Sep 12, 2019 29:51

A photographer and a writer, both who grew up in military families, are collaborating to examine the growth industry of homeland security in the United States for an upcoming book.Danny Goodwin, a photographer and an associate professor of art, and Edward Schwarzschild, an associate professor of English, have conducted dozens of interviews with current and former DHS and intelligence personnel over the course of two years.The book, tentatively titled Job Security, will feature interviews edited by Schwarzschild as well as portraits and other photographic works by Goodwin.On this episode, Schwarzschild shares about his time working for the TSA. He also wrote about his experience as an airport security guard for The Guardian in 2017. Learn more about Schwarzschild's work.Photo credit: “Claymore (Inert)”, 2017. 44 x 54” Pigment Print by Danny Goodwin. View more of Goodwin's recent work.The UAlbany News Podcast is hosted and produced by Sarah O'Carroll, a Communications Specialist at the University at Albany, State University of New York, with production assistance by Patrick Dodson and Scott Freedman.Have a comment or question about one of our episodes? You can email us at mediarelations@albany.edu, and you can find us on Twitter @UAlbanyNews.

044 Herr Schwarzschild und die Nichtlinearität

Absolut Analog

Play Episode Listen Later May 1, 2019 15:38

Chris und Moni reden über die analogen Dinge. Von schönen Kameras über Prozesse bei der Arbeit mit Film bis zu analogen Kuriositäten. Die Reise wird spannend und vielfältig.

film arbeit dinge herr kamera prozesse analog fotografie die reise moni kameras kuriosit schwarzschild nichtlinearit

Dominio Digital 19.4.2019 Web Performance, perder clientes por milisegundos

Dominio Digital

Play Episode Listen Later Apr 19, 2019 57:38

Dominio Digital | 19 de abril de 2019 1:00 No todo es bitcoin en el mundo de las criptomonedas: la BNB (Binance Coin) supera su valor nominal y está a punto de convertirse en criptomoneda de referencia. 5:30 Qué puede y podrá hacer la tecnología por la reconstrucción de la catedral de Notre Dame. La empresa de videojuegos Ubisoft ayudará a la restauración gracias a que uno de sus juegos, el Assasin's Creed, posee la digitalización de toda la catedral tanto por fuera como por dentro. 8:13 Script realizado por Fernando para calcular cual debería ser el tamaño de un telescopio para poder llegar a observar, por ejemplo, la bandera estadounidense en la luna y además para calcular el radio de Schwarzschild. 9:34 Fernando analiza una teoría sobre fotones compartida por un oyente: "el achanchamiento de los fotones". 12:33 Luego del 512K en 2014, ahora nos acercamos al 768K que marca el límite de tamaño de las tablas de ruteo en algunos routers. 16:30 El 7 de mayo se lanza la XBOX S que ya no tiene lector de blu-ray. Cuál es el futuro de la consola como tal. 20:43 Invitado: Maximiliano Firtman, director de ITMaster. Amazon pierde el 1% de ventas si tarda 100 ms. de más en cargar su página web. Cómo y por qué mejorar la web performance de un sitio. Charla online organizada por LatinCloud: https://www.youtube.com/watch?v=Tb__cEIdfh8 36:10 Ejemplos de mala web performance: citar recursos externos, scripts de db mal hechos. Pruebas de stress de un servidor. Joel: "Los sitios también envejecen". 41:10 Discusión de antaño: ¿por qué la gente no migra a Linux? Fernando analiza el enfoque de la premisa en base a dos artículos. 43:37 Alejandro le hace una mosqueta matemática de 3 cartas a Claudio. El problema de Monty Hall. Probabilidad y estadística. 50:42 ¿Cual es el circuito para obtener Bitcoins y poder utilizarlos como medio de compra? ¡Gracias Cristian Kirk por armar el índice!

Edicion Limitada - 11 de Marzo del 2019