Comment on Dark Matter
Tlaloc_Temporal@lemmy.ca 2 months agoInteresting. I’ve heard about cosmological coupling before, I wonder if PBS Spacetime or Dr. Becky have mentioned this theory yet.
Showing that BH energy density stays constant, like the proposed cosmological constant, is quite interesting, but I also don’t understand the leap to how that drives expansion. If vacuum energy was everywhere, I can see how that would push things apart and push harder as space grew, but if vacuum energy exists in BHs I can’t make the connection to a repulsive force. Perhaps this is a event horizon resonance mode or something? Where event horizons exists for everything, and they’re size and relativistic motion press upon the universe? I don’t know.
Wikipedia seems to have this paper’s theory listed already (here), though reception seems mixed.
ShaunaTheDead@fedia.io 2 months ago
Yeah I figured it maybe also had something to do with the distribution of matter throughout the universe. We assumed when we made predictions of the distant past that the supermassive black holes at the center of galaxies were the same mass as they are today, but if they were less massive then it might help explain why black holes didn't gather as much material into it's orbit as we would have thought.
I think you're right though that it has more to do with the negative pressure that space and the black holes seem to exert although I must admit I don't really understand what that means or how you would get a negative pressure from a black hole or from space.