Re:UHZ1: NASA Telescopes Discover Record-Breaking Black Hole
by The_Colonel on Monday November 06, 2023 @06:08PM
(#38170509)
> if all the mass of the black hole were spread out evenly throughout it.
That seems like a weird condition. "Average density" is pretty well-defined and doesn't need even spreading.
Even more, isn't the distribution of mass within a black hole a meaningless question? There's no information coming from the black hole, for an external observer it literally doesn't matter how the matter is arranged within.
Re:UHZ1: NASA Telescopes Discover Record-Breaking Black Hole
by lumost on Monday November 06, 2023 @09:07PM
(#38172271)
This assumes the mass forms a perfect sphere with no thermal oscillations or other deformities.
Re:UHZ1: NASA Telescopes Discover Record-Breaking Black Hole
by The_Colonel on Tuesday November 07, 2023 @08:31AM
(#38176499)
What claim needs an assumption of being perfectly spherical?
A rotating (or merging) black hole can be deformed (non-spherical), but that doesn't stop you to calculate average density.
Re:UHZ1: NASA Telescopes Discover Record-Breaking Black Hole
by lumost on Sunday November 12, 2023 @08:03PM
(#38245758)
My comment was on the the innards of the black hole as a meaningless topic. The event horizon (if observable) is likely to have an immense amount of detail on the geometry and mass distribution inside the event horizon.
What does that mean? The Schwarzschild radius is just the distance at which even light can no longer escape, the only matter there is the matter that happens to be falling in at that moment. Unless you mean the average density within the Schwarzschild volume (a term I just made up as far as I know, but you know what I mean) if all the mass of the black hole were spread out evenly throughout it.