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Caltech Astro Seminars
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We are the Department of Astronomy and Astrophysics at the California Institute of Technology. This channel broadcasts and records high-level research talks designed for professional astronomers as part of our colloquium and other seminar series. All are welcome to watch these colloquium presentations; however, for talks specifically designed for the general public, please see our Caltech Astro Outreach channel: ruclips.net/user/caltechastro.
For more information about our department, please see: astro.caltech.edu .
For more information about our department, please see: astro.caltech.edu .
Rotation in Stars: Impacts on Single, Binary, and Planetary Evolution - Arnab Sarkar - 06/20/2024
This is a high-level research talk designed for professional astronomers. It is part of the Caltech Astronomy TAPIR seminar series, roughly hour-long presentations given by top scientists from around the world to the members of our department. All are welcome to watch these presentations; however, for talks specifically designed for the general public, please see our Caltech Astro Outreach channel: ruclips.net/user/caltechastro
Date: 06/20/2024
Speaker: Arnab Sarkar - University of Cambridge
Title: Rotation in Stars: Impacts on Single, Binary, and Planetary Evolution
Abstract:
Rotation is a fundamental property of astrophysical systems that operates in objects ranging from planets to galaxies....
Date: 06/20/2024
Speaker: Arnab Sarkar - University of Cambridge
Title: Rotation in Stars: Impacts on Single, Binary, and Planetary Evolution
Abstract:
Rotation is a fundamental property of astrophysical systems that operates in objects ranging from planets to galaxies....
Просмотров: 108
Видео
How black holes are born, grow, and launch outflows - Goni Halevi - 06/07/2024
Просмотров 4545 месяцев назад
This is a high-level research talk designed for professional astronomers. It is part of the Caltech Astronomy TAPIR seminar series, roughly hour-long presentations given by top scientists from around the world to the members of our department. All are welcome to watch these presentations; however, for talks specifically designed for the general public, please see our Caltech Astro Outreach chan...
Coupling & Collisions: The Dynamic Lives of Galactic Atmospheres - Chris Carr - 05/10/2024
Просмотров 4925 месяцев назад
This is a high-level research talk designed for professional astronomers. It is part of the Caltech Astronomy TAPIR seminar series, roughly hour-long presentations given by top scientists from around the world to the members of our department. All are welcome to watch these presentations; however, for talks specifically designed for the general public, please see our Caltech Astro Outreach chan...
Double White Dwarf Binaries - Sunny Wong - 05/24/2024
Просмотров 1575 месяцев назад
This is a high-level research talk designed for professional astronomers. It is part of the Caltech Astronomy TAPIR seminar series, roughly hour-long presentations given by top scientists from around the world to the members of our department. All are welcome to watch these presentations; however, for talks specifically designed for the general public, please see our Caltech Astro Outreach chan...
Stellar Rotation Effects on the Stellar Wind - Bhimsen Shivamoggi - 04/19/2024
Просмотров 1176 месяцев назад
This is a high-level research talk designed for professional astronomers. It is part of the Caltech Astronomy TAPIR seminar series, roughly hour-long presentations given by top scientists from around the world to the members of our department. All are welcome to watch these presentations; however, for talks specifically designed for the general public, please see our Caltech Astro Outreach chan...
Stellar transient from triple interactions - Hila Glanz - 04/12/2024
Просмотров 1466 месяцев назад
This is a high-level research talk designed for professional astronomers. It is part of the Caltech Astronomy TAPIR seminar series, roughly hour-long presentations given by top scientists from around the world to the members of our department. All are welcome to watch these presentations; however, for talks specifically designed for the general public, please see our Caltech Astro Outreach chan...
Large-scale Convection in Massive Star Envelopes - Jared Goldberg - 03/15/2024
Просмотров 2087 месяцев назад
This is a high-level research talk designed for professional astronomers. It is part of the Caltech Astronomy TAPIR seminar series, roughly hour-long presentations given by top scientists from around the world to the members of our department. All are welcome to watch these presentations; however, for talks specifically designed for the general public, please see our Caltech Astro Outreach chan...
Signatures from late-time disk accretion in neutron star mergers - Wenbin Lu - 03/08/2024
Просмотров 1258 месяцев назад
Signatures from late-time disk accretion in neutron star mergers - Wenbin Lu - 03/08/2024
Planet Formation Close-in and Far-out - Nick Choksi - 03/01/2024
Просмотров 2298 месяцев назад
Planet Formation Close-in and Far-out - Nick Choksi - 03/01/2024
Delayed Explosions of Red Supergiants Following "Failed" Supernovae - Andrea Antoni - 02/23/2024
Просмотров 1848 месяцев назад
Delayed Explosions of Red Supergiants Following "Failed" Supernovae - Andrea Antoni - 02/23/2024
Detecting large baryonic feedback around DESI photometric galaxies - Boryana Hadzhiyska -02/16/2024
Просмотров 2148 месяцев назад
Detecting large baryonic feedback around DESI photometric galaxies - Boryana Hadzhiyska -02/16/2024
A Cloud-Scale View of the Star Formation Process - Eva Schinnerer - 06/07/2023
Просмотров 402Год назад
A Cloud-Scale View of the Star Formation Process - Eva Schinnerer - 06/07/2023
Early Phases of Galaxy Formation and Cosmic Reionization - Masami Ouchi - 05/31/2023
Просмотров 260Год назад
Early Phases of Galaxy Formation and Cosmic Reionization - Masami Ouchi - 05/31/2023
Chasing Ghosts: Electromagnetic Counterparts to High-Energy Neutrinos - Robert Stein - 05/24/2023
Просмотров 189Год назад
Chasing Ghosts: Electromagnetic Counterparts to High-Energy Neutrinos - Robert Stein - 05/24/2023
Elves, Dwarfs, and Monsters - Jenny Greene - 05/17/2023
Просмотров 187Год назад
Elves, Dwarfs, and Monsters - Jenny Greene - 05/17/2023
The Evolution of Stellar Rotation - Jamie Tayar - 05/10/2023
Просмотров 150Год назад
The Evolution of Stellar Rotation - Jamie Tayar - 05/10/2023
Simple Behavior from Complex Galaxies - George Helou - 05/03/2023
Просмотров 113Год назад
Simple Behavior from Complex Galaxies - George Helou - 05/03/2023
Big Stars and Their Little Friends - Morgan MacLeod - 04/26/2023
Просмотров 83Год назад
Big Stars and Their Little Friends - Morgan MacLeod - 04/26/2023
Constraining the Cosmic Baryon Cycle with ALMA- Fabian Walter - 04/19/2023
Просмотров 154Год назад
Constraining the Cosmic Baryon Cycle with ALMA- Fabian Walter - 04/19/2023
Illuminating the Origins of the Universe's Fastest Transients - Wen-fai Fong - 04/05/2023
Просмотров 245Год назад
Illuminating the Origins of the Universe's Fastest Transients - Wen-fai Fong - 04/05/2023
eROSITA on SRG: Mapping the Hot Universe - Andrea Merloni - 03/15/2023
Просмотров 189Год назад
eROSITA on SRG: Mapping the Hot Universe - Andrea Merloni - 03/15/2023
Mapping the Cosmic Web with IGM Tomography - Andrew Newman - 03/08/2023
Просмотров 169Год назад
Mapping the Cosmic Web with IGM Tomography - Andrew Newman - 03/08/2023
Mo' Data, No Problem: Into the Age of Industrial Scale Astronomy - Xinlun Cheng - 05/15/2023
Просмотров 116Год назад
Mo' Data, No Problem: Into the Age of Industrial Scale Astronomy - Xinlun Cheng - 05/15/2023
Detecting Gaps in Globular Cluster Stellar Streams in M31 - Christian Aganze - 04/24/2023
Просмотров 265Год назад
Detecting Gaps in Globular Cluster Stellar Streams in M31 - Christian Aganze - 04/24/2023
LISA's and multi-band and multi-messenger astronomy - Katie Breivik - 04/04/2023
Просмотров 298Год назад
LISA's and multi-band and multi-messenger astronomy - Katie Breivik - 04/04/2023
Stellar rotation period distributions - Mark Popinchalk - 03/13/2023
Просмотров 168Год назад
Stellar rotation period distributions - Mark Popinchalk - 03/13/2023
A Suite of Dwarf Galaxy Simulations to Interpret Observations - Alyson Brooks - 03/01/23
Просмотров 256Год назад
A Suite of Dwarf Galaxy Simulations to Interpret Observations - Alyson Brooks - 03/01/23
Theories of Planet Formation - Eve Lee - 02/15/2023
Просмотров 455Год назад
Theories of Planet Formation - Eve Lee - 02/15/2023
The Galaxy Evolution in the Large-scale Structure - Rieko Momose - 03/06/2023
Просмотров 260Год назад
The Galaxy Evolution in the Large-scale Structure - Rieko Momose - 03/06/2023
Disk dispersal phase to magnetic morphology-driven stellar spin-down - Kristina Monsch - 02/27/2023
Просмотров 116Год назад
Disk dispersal phase to magnetic morphology-driven stellar spin-down - Kristina Monsch - 02/27/2023
It's to bad such smart people are stumped by basic audio-visual technology.........
i really love your videos would you like some recommendation ?
Thank you. Here are my thoughts in the context of CIG Theory: adjective 1.of, from, or characteristic of India, Pakistan, or Bangladesh." Priyanka is a true desi girl at heart 2.unadulterated or pure. "desi ghee" noun * a person of South Asian birth or descent who lives abroad. " the crowd was fantastic, full of desis, we felt like we were playing in India OR Could your DESI data confirm that the stellar entities that are releasing the most ENERGY are also the entities that have the greatest RED SHIFT? Normalized one to the other to an even spatial background field (i.e. isolated and corrected to remove RED SHIFT expansions from other foreground and background "OTHER RED SHIFTS", such that one is only seeing the Red Shift of that specific stellar entity alone. And that the isolated RED SHIFT correlates to the greatest energy release (released from the entity into Space, not contained and not released) (actually not into Space but a creation of Matter to Space) is proportional to the greatest expansion. And this correlates to an expansion (creation of Space from Matter) ENERGY to SPACE based on ENERGY. And does this align in any way with the CUPI as calculated in the book "I Have Become Space" ? In other words, please use your data to confirm CIG Theory. It's right there. CIG Theory is the fundamental explanation for the data you are seeing. Please investigate. In CIG Theory, E=MC2 interprets "E" as new Volumes (SPACE ITSELF). Thank you kindly. Excellent -thank you so so much. Maybe, and a theoretical maybe at that , with of curse CIG Theory in mind, and to further vindicate Halton Arp, and with the Cosmological Non-constant in mind, and to offer that Albert E. has gotten a final word over Neil's B., the following could be considered: According to CIG Theory, the most Dark Energy will be created at a time when the most Energy (light motion of matter) is being released, actually the creation of Space from Matter (not Space from Space as is the current discussions among Cosmologists). So, a slowing over time of Dark Energy will be evident when that light in the Universe has already become Space and as such there is little light leftover to become more Space. This will be gradual. I am trying to explain in the context of CIG Theory why you are seeing the slowing promulgation of Dark Energy over time, since there is less light Matter to turn into Dark Energy (Space). In the EMS the Dark Energy wavelength will be very very long, shorter for Dark Matter, still shorter for Visible Light, and shortest for Black Holes, the full curvature of Spacetime. Please look at CIG Theory in the context of DESI Data findings of a weaker Dark Energy , of Mariangela Lisanti's Dark Matter waves, of Halton Arp's Red Shift Anomalies, of the Measurement Problem, and of the Vacuum Catastrophe. So, the greatest expansion (Hubble Non-Constant) will take place when there exists the most light in the Universe and when there is no light left, the expansion of Space will stop. The Hubble Tension can be explained away as in the early Universe there existed a propensity for less light to escape and become the long long longest wavelength Dark Energy. Then at a later time, the light was much more pronounced, and the fast moving matter unfolded to become the Dark Energy. that Energy is weakening as the light fades. A comment I left on my RUclips website: The intent herein is to provide a new definition of space consistent with the CIG Theory, which has already offered a new definition of Matter. That new definition of Matter is: That which has mass, consists of the curvature of space-time and has an element of motion. While the current definition of space in its simplest form customarily is: "a boundless three-dimensional extent in which objects and events occur and have relative position and direction" As can be seen, since we have redefined Matter in the context of the curvature of space-time, we must also redefine "Space" as well, herein and as best I can, as follows: Space is that three dimensional extent in which objects and their events occur, wherein those objects of Matter are they themselves curved space-time, wherein the aforementioned space consists of and emerges via the unfolding of that Matter into various volumes and densities of Space by way of opportunistic rates of motion of Matter. In it's simpler form, Space is unfolded Matter, emergent from rates of motion. That's it and if I come up with a better definition or if someone else would like a try in the context of CIG Theory, please have a go at it. In this manner, a particle can become spatial and go through both slits in the double slit experiment. So, within the MTS equation we have all wavelengths, from the shortest (Black Hole) to the longest (Dark Energy). Dark Matter then is a wavelength not as long as Dark Energy. But CIG Theory still needs a more direct link to the reality of the electromagnetic spectrum in the context that the spectrum proceeds at "c". Are we sure it always proceeds at "c"? Maxwell made this link yes, but in CIG, the "c" portion of the spectrum is reserved for Dark Energy, while the lesser rates = more solid forms of matter. Quantum Gravity appears resolved in CIG. But this aspect of melting CIG into the spectrum because of the consistency of the spectrum to travel at "c" confuses me. Any help would be appreciated. CIG resolves so many quantum and cosmological conundrums. We know it is correct. While inherent to CIG is the link between Dark Matter and Dark Energy, the direct reference to Dark Matter waves was absorbed from Dr. Lisanti's Simon Foundation video on Dark Matter. She is amazing. The offering then is that we extend the wavelength to Dark Energy which is much much longer than even Dark Matter. The MTS equation links Black Holes to Dark Energy. As stated above though, that issue of "c" as applied to the spectrum bothers me. HELP! The intent herein is to provide a new definition of space consistent with the CIG Theory, which has already offered a new definition of Matter. That new definition of Matter is: That which has mass, consists of the curvature of space-time and has an element of motion. While the current definition of space in its simplest form customarily is: "a boundless three-dimensional extent in which objects and events occur and have relative position and direction" . As can be seen, since we have redefined Matter in the context of the curvature of space-time, we must also redefine "Space" as well, herein and as best I can, as follows: Space is that three dimensional extent in which objects and their events occur, wherein those objects of Matter are they themselves curved space-time, wherein the aforementioned space consists of and emerges via the unfolding of that Matter into various volumes and densities of Space by way of opportunistic rates of motion of Matter. In it's simpler form, Space is unfolded Matter, emergent from rates of motion. That's it and if I come up with a better definition or if someone else would like a try in the context of CIG Theory, please have a go at it. In this manner, a particle can become spatial and go through both slits in the double slit experiment. The Red Shift Cosmological data already confirms CIG Theory. The Double Slit experiments already confirms CIG Theory. A boiling pot of water and the Ideal Gas Law confirms CIG Theory. CIG Theory confirms CIG Theory.
How embarrassing
All of this information allows for large scale guessing about how the planets formed, but no man was there to watch it, so its speculation for hire. But eventually some man way be able to deduce a better picture of how the planets came to be where they are now, which might be interesting on some level. QED. In the mean time, study of the M-5 String theory of String-let wave plank length coupling will be more important to humanity, as it describes how gravity works and how the zero-point energy arises at the plank scale..
Audio is too poor to listen to for any length of time... Is this the best Caltech can do in this day and age?
Wanted to watch, but audio is so bac
Upspeak and fry.😮
Stellar evolution is planet formation.
Black holes are based on a mathematical misconception. In the 1939 journal "Annals of Mathematics" Einstein wrote - "The essential result of this investigation is a clear understanding as to why the Schwarzchild singularities (Schwarzchild was the first to raise the issue of General Relativity predicting singularities) do not exist in physical reality. Although the theory given here treats only clusters (star clusters) whose particles move along circular paths it does seem to be subject to reasonable doubt that more general cases will have analogous results. The Schwarzchild singularities do not appear for the reason that matter cannot be concentrated arbitrarily. And this is due to the fact that otherwise the constituting particles would reach the velocity of light." General Relativity predicts dilation, not singularities. It's the phenomenon behind the phrase "mass becomes infinite at the speed of light". Time dilation is just one aspect of dilation, it's not just time that gets dilated. Even mass that exists at 75% light speed is partially dilated. Dilation will occur wherever there is an astronomical quantity of mass because high mass means high momentum. It's the original and correct explanation for why we cannot see light from the galactic center. It can be inferred mathematically that the mass at the center of our own galaxy must be dilated. This means that there is no valid XYZ coordinate we can attribute to it, you can't point your finger at something that is smeared through spacetime. More precisely, everywhere you point is equally valid. This is the explanation for dark matter. The "missing mass" is dilated mass. Dilation does not occur in galaxies with low mass in their centers because they do not have enough mass to achieve relativistic velocities. To date, 6 very low mass galaxies including NGC 1052-DF2 have been confirmed to show no signs of dark matter. This also explains why all planets and all binary stars have normal rotation rates, not 3 times normal. Einstein is known to have repeatedly said that singularities are not possible. Nobody believed in them when he was alive including Plank, Bohr, Schrodinger, Dirac, Heisenberg, Feynman etc. There can only be clarity in astronomy when the concept of singularities is abandoned.
I am so elated
Freat content, bad audio
It is so frustrating to hear this channel struggle withe audio
Ouch, great content, the lapel mic is borked near the end
15:00 28:30 andromeda
9:30 13:15 chem. gliese 229b #1
Awesome ❤️❤️❤️❤️
Could we be in a binary system with a brown dwarf “world”?
First!
Such a nice talk!!
These are wonderful and I find them quite interesting and valuable. The static is so bad especially in the intro that it can be difficult to hear all the presenter’s words.
Oh! Fixed as I wrote this. Never mind!
It clears up quite a bit ~ 35:00
Wonderful talk 👏👏
I don't see the problem with a brown dwarf orbiting a star. What about a red dwarf orbiting a G-type star? Is there now a problem now. So. I would say that burning deuterium is a good indicator.
A reference for fundamentals. Thank you.
Thanks for the video!
🌷 [̲̅p][̲̅r][̲̅o][̲̅m][̲̅o][̲̅s][̲̅m]
I'm VERY sad!! to find that only 129 views For this great lecture!! shame on you!! Sorry Dr. Risa♥ and ur group, we appreciate ur efforts♥
ρɾσɱσʂɱ 💘
It seems stars are creating new elements over the lifetime of the universe. Couldn't these compact stars be creating unknown elements? Perhaps the "island of stability" and beyond?