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Inst. of Particle and Cosmos Physics (IPARCOS-UCM)
Spain
เข้าร่วมเมื่อ 24 ม.ค. 2021
El Instituto de Física de Partículas y del Cosmos (IPARCOS) es un instituto de investigación de la Universidad Complutense de Madrid. Sus principales areas temáticas incluyen la Astrofísica y Cosmología, la Física Nuclear y de Partículas y la Instrumentación Científica Avanzada. En este canal de TH-cam podrás encontrar información sobre las diferentes actividades científicas y de divulgación que llevamos a cabo.
The Institute of Particle Physics and Cosmos (IPARCOS) is a research institute of the Complutense University of Madrid. Its main areas of interest include Astrophysics and Cosmology, Nuclear and Particle Physics, and Advanced Scientific Instrumentation. On this TH-cam channel you will find information about the different scientific and outreach activities we carry out.
The Institute of Particle Physics and Cosmos (IPARCOS) is a research institute of the Complutense University of Madrid. Its main areas of interest include Astrophysics and Cosmology, Nuclear and Particle Physics, and Advanced Scientific Instrumentation. On this TH-cam channel you will find information about the different scientific and outreach activities we carry out.
No Black Holes from Light
The idea that light could form black holes (or that we could use light
to create them in the laboratory) has garnered interest both in specialized
gravitational research and popular science. This new research shows that
this is not possible: light cannot form an event horizon due to previously
disregarded quantum phenomena!
Script, presentation, animation and production: Álvaro Álvarez Domínguez.
Based on the paper Phys. Rev. Lett. 133, 041401: Álvaro Álvarez Domínguez, Luis J. Garay, Eduardo
Martín-Martínez, and José Polo-Gómez.
journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.041401, arxiv.org/abs/2405.02389
to create them in the laboratory) has garnered interest both in specialized
gravitational research and popular science. This new research shows that
this is not possible: light cannot form an event horizon due to previously
disregarded quantum phenomena!
Script, presentation, animation and production: Álvaro Álvarez Domínguez.
Based on the paper Phys. Rev. Lett. 133, 041401: Álvaro Álvarez Domínguez, Luis J. Garay, Eduardo
Martín-Martínez, and José Polo-Gómez.
journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.041401, arxiv.org/abs/2405.02389
มุมมอง: 550
วีดีโอ
¿Agujeros Negros de Luz?
มุมมอง 432หลายเดือนก่อน
La idea de que la luz pudiese formar agujeros negros (o de que pudiéramos usarla para crearlos en el laboratorio) ha captado el interés tanto de las investigaciones especializadas en gravitación como de la ciencia popular. En este vídeo presentamos un nuevo estudio que, teniendo en cuenta efectos cuánticos que hasta ahora se habían ignorado, demuestra que esto no es posible: ¡la luz no puede ge...
[IPARCOS astro] April 3rd, 2024 "A treasure trove of active galaxies and quasars in the DESI survey"
มุมมอง 1105 หลายเดือนก่อน
[IPARCOS astro-seminar] 03/04/2024 Dr. Dr. Stephanie Juneau (NSF's NOIRLab, USA) Title: A treasure trove of active galaxies and quasars in the DESI survey Abstract: The identification and study of active galactic nuclei (AGN) is fundamental to our understanding of black hole growth as well as for a complete picture of galaxy formation and evolution. Supermassive black holes are ubiquitous in th...
[IPARCOS astro-seminar] Dr. Esperanza Carrasco Licea (INAOE, Mex.) , Thursday, Nov 3rd 2022 @1pm CET
มุมมอง 78ปีที่แล้ว
[IPARCOS astro-seminar] Dr. Esperanza Carrasco Licea (INAOE, Mex.) , Thursday, Nov 3rd 2022 @1pm CET
[IPARCOS astro-seminar] Dr. Almudena Prieto, Wednesday, September 29th 2021 @ 17:00 CEST
มุมมอง 522 ปีที่แล้ว
[IPARCOS astro-seminar] Dr. Almudena Prieto, Wednesday, September 29th 2021 @ 17:00 CEST
[IPARCOS astro-seminar] Mr. Clayton Strawn, Wednesday, June 2nd 2021 @ 17:00 CEST
มุมมอง 323 ปีที่แล้ว
[IPARCOS astro-seminar] Mr. Clayton Strawn, Wednesday, June 2nd 2021 @ 17:00 CEST
[IPARCOS astro-seminar] Dr. Nir Mandelker, Wednesday, May 19th 2021 @ 17:00 CEST
มุมมอง 523 ปีที่แล้ว
[IPARCOS astro-seminar] Dr. Nir Mandelker, Wednesday, May 19th 2021 @ 17:00 CEST
IPARCOS astro-seminar by Carlos Gomez Guijarro (2021-03-05)
มุมมอง 1143 ปีที่แล้ว
IPARCOS astro-seminar by Carlos Gomez Guijarro (2021-03-05)
[IPARCOS astro-seminar] Dr. Mercè Romero-Gómez 19/02/2021
มุมมอง 603 ปีที่แล้ว
[IPARCOS astro-seminar] Dr. Mercè Romero-Gómez 19/02/2021
[IPARCOS astro-seminar] Dr. Jonathan Freundlich 27/01/2021
มุมมอง 1473 ปีที่แล้ว
[IPARCOS astro-seminar] Dr. Jonathan Freundlich 27/01/2021
Super dense regions of space are stars that cannot violate the fundamental law that there needs to be two electromagnetic field (line) vectors away from the bulk mass of the celestial object. Prove that there exists a “black hole mass” that ceases this fundamental law or stop talking about black holes.
Your photons will create electrons and positrons, because your photons in that tiny space are only gamma rays photons. If you want to build a black hole from photons, then avoid such scenarios (the creation of gamma rays photons) to succeed! The trick is to focus on tiny space without magnifying the frequency of the photons, which is not impossible in the sense of tachyonic dynamics.
Hi! Thanks for your comment. Actually, this particle production phenomenon (known as the Schwinger effect) occurs not only at high frequencies but also in constant electric fields. Indeed, our arguments are based on calculations done with constant electric fields, which are then extended to higher frequencies. Additionally, we demonstrate not only the impossibility of creating tiny black holes but also those the size of the Sun.
That just means that you can’t make a SMALL black hole
Hi! Thanks for your comment. The arguments in our paper prove the impossibility of creating black holes from gravitational collapse for sizes up to the order of those of the size of the Sun.
I did a quick read of your paper. It seems your prediction is highly dependent on the Schwinger effect which has not solidly been proven to exist. You also mention wavelength of 10^-22 is needed. While rare, some ultra high energy cosmic rays with energies of 244 exa electron volts has been detected. A wavelength of about 5.08x10^-27. Well below the 10^-22 wavelength mentioned in the paper. So, even if Schwinger effect did exist, if enough super high energy cosmic rays just happened to converge on a single point at the same time in space would it form a black hole? Maybe I missed something and have to read the paper again.
Hi! Thanks for your appreciation and for reading our paper! Although, as you say, the Schwinger effect as it is has not been experimentally verified with lasers, it has already been observed in analogues, and other similar particle production phenomena have been seen as well. It is a well-accepted theoretical prediction by the community. Regarding the 10^-22 m wavelength you mention, we only state that our arguments are not strictly valid below that regime because, at those extremely high frequencies, inhomogeneities might be relevant and a deeper study considering that would need to be carried out. However, we expect that the potential effects that the spatial inhomogeneities could lead would not modify our result.
¿Y si la luz se concentra dentro de un confinamiento magnético?
Buenas. Muy buena pregunta. En ese caso, probamos que intentar confinar a los electrones y positrones que se crean lo único que hace es transformar el mecanismo en el que se disipa energía. En particular, las partículas emitirían radiación de frenado (Bremsstrahlung), que se escapa igualmente de la región donde estamos intentando concentrar la luz. Digamos que es otro mecanismo diferente de escape de energía que el del vídeo, pero con el mismo desenlace.
Black holes are based on a mathematical misconception. G.R predicts dilation not singularities. 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 G.R. 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." He was referring to the phenomenon of dilation (sometimes called gamma or y) mass that is dilated is smeared through spacetime relative to an outside observer. It's the phenomenon behind the phrase "mass becomes infinite at the speed of light". A graph illustrates its squared nature, dilation increases at an exponential rate the closer you get to the speed of light. A "time dilation" graph illustrates the same phenomenon, it's not just time that gets dilated. Dilation will occur wherever there is an astronomical quantity of mass because high mass means high momentum. There is no singularity/black hole at the center of our galaxy. It can be inferred mathematically that dilation is occurring there. In other words that mass is all around us. This is the explanation for galaxy rotation curves. The "missing mass" is dilated mass. Dilation does not occur in galaxies with low mass centers because they do not have enough mass to achieve relativistic velocities. To date, 6 very low mass galaxies including NGC 1052-DF2 and DF4 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. The concept of singularities is preventing clarity in astronomy. Einstein is known to have repeatedly said that they cannot exist. Nobody believed in them when he was alive including Plank, Bohr, Schrodinger, Dirac, Heisenberg, Feynman etc.
fyvvp vur.fyi
Very good speech