Thibault Damour - Einstein's Equations for Binary Black Holes

In this video series entitled "Conversations at Niels Bohr's Office" Johan Samsing from the Niels Bohr Institute presents conversations with some of the most influential physicists and thinkers of over time on topics related to the fundamental physics of our Universe.
Each episode is recorded at the historical Niels Bohr's Office and based on one long take with no script, with the intention of creating a more natural conversation about whatever topics the guest wants to highlight.
*The are problems with the sound in this episode for technical reasons*
7. Episode: "What led to Solving Einstein's Equations for Binary Black Holes?"
Thibault Damour is a French physicist, best known for his groundbreaking work on gravitational waves from compact binary systems, and his invention with Alessandra Buonanno, of the "effective one-body" approach to represent the orbital trajectories of binary black holes. T. Damour was a permanent professor in theoretical physics at the Institut des Hautes Études Scientifiques from 1989 to 2022, where he is now professor emeritus. T. Damour has received numerous prizes including the Balzan Prize for Gravitation, as well as the Galileo Galilei Medal and the Dirac Medal of the ICTP.

[@tutux7847]

An intriguing alternative to the conventional concept of dark matter is the Janus model, which introduces the idea of negative mass matter. According to this theory, there would be particles of negative mass antimatter that would repel the ordinary matter that makes up our galaxies. These particles would be invisible to our instruments because they would emit negative energy photons, thus eluding conventional detection. This concept is supported by a large number of astronomical observations currently attributed to dark matter, without resorting to the specific adjustments of the standard model, which is increasingly inconsistent with recent observations. It even provides a nature to this antimatter composed of anti-electron, anti-proton, anti-neutron, anti-hydrogen, and anti-helium with negative mass.
ruclips.net/video/OZTdBUY28Qk/видео.htmlsi=fubU0Zs978y75eVj

[@shawns0762]

Black holes are based on a mathematical misconception. General Relativity 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 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."
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". Time dilation is one aspect of dilation. Wherever there is an astronomical quantity of mass, dilation will occur because high mass means high momentum. Dilation is the original and correct explanation for why we cannot see light from the galactic center.
It can be shown mathematically that the mass at the center of our own galaxy must be dilated. In other words that mass is all around us. Sound familiar? This is the explanation for dark matter. The "missing mass" is dilated mass.
Dilation does not occur in galaxies with very, very low mass because they do not have enough mass in their centers to achieve relativistic velocities. It has recently been confirmed in 5 very, very low mass galaxies to show no signs of dark matter. For the same reason binary stars will always have predictable rotation rates..

[@tutux7847]

In Einstein's theory of relativity, it's time, not matter, that experiences dilation due to gravity or speed.

[@shawns0762]

@@tutux7847 No, it's not just time that gets dilated. Neil deGrasse Tyson recently talked about this. Dilation is the phenomenon our high school teachers were talking about when they said "mass becomes infinite at the speed of light"

[@tutux7847]

Yes time and space are predicted and confirmed by GR. Not mass

[@shawns0762]

@@tutux7847 Do some research before you make comments. Again, time dilation is one aspect of dilation/gamma/y.