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Registered Member #190
Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
I recently read an article that some physicists don't think black holes stay in existence too long. That is, black holes do not exist. Everyday, though, I keep hearing the physics community talk about black holes.
Is this reference legit? The article says the journal is NOT peer reviewed, so I can only guess there is something fishy here.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Hmm. Geometric solutions that do not take into account turbulence and asymmetry are mathematically correct but not always consistent with real world physics.
That said, neutron stars have been revealed to have internal structure going down to the subatomic level so it is possible black holes actually do have internal geometry that isn't visible from the outside of the event horizon.
Current consensus is, that black holes don't live forever and decay by Hawking radiation. That is a _very_ slow process for massive black holes, e.g. on the order of 10^60 years. This doesn't imply, that they don't exist. The problem of information loss is circumvented by postulating, that the Hawking radiation contains the "lost" information. There are huge theoretical problems, though, of getting quantum mechanics to be consistent with general relativity.
Life time of miniature black holes is predicted to be much shorter. This has been one of the arguments, why hypothetically produced mini holes by the large hadron collider would evaporate a long time before they could accrete more mass to become dangerous.
Registered Member #42796
Joined: Mon Jan 13 2014, 06:34PM
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Posts: 195
Uspring wrote ...
hypothetically produced mini holes by the large hadron collider would evaporate a long time before they could accrete more mass to become dangerous.
back then when it was a hot topic someone calculated that such a black hole ignoring the very very short life would take 10k - 100k years of swallowing enough matter to become dangerous
Registered Member #2529
Joined: Thu Dec 10 2009, 02:43AM
Location:
Posts: 600
I strongly suspect that the research isn't complete.
The current understanding of black holes seems to be shifting from:
a black hole forms -> event horizon + singularity at the centre
to:
a black hole forms -> firewall forms + flat spacetime inside that
They would both look the same from the outside, but if you fell in, you would hit the firewall (consists of Hawking radiation, and similar) and get fried and spread over the surface of the black hole and the black hole would get a bit bigger.
The thing that hasn't been worked out yet is how the firewall forms and exactly how it stays stable, but this seems to be the only really workable explanation of the known physics and observations right now. But there's no consensus yet, and this paper is part of physicists trying to work it out.
The thing that hasn't been worked out yet is how the firewall forms and exactly how it stays stable, but this seems to be the only really workable explanation of the known physics and observations right now.
don't seem to reconcile. Nobody has been in a black hole.
Registered Member #65
Joined: Thu Feb 09 2006, 06:43AM
Location:
Posts: 1155
Any rational explanation is plausible without falsifiable assertions. However, most of these theories will never be scientifically accurate without experimental or observational proof. While Hawking radiation emissions have been observed, it still does not prove the underlying phenomena match speculative models.
Some of Hawking's work is reminiscent of this fellow: “Distortion of Truth by Associationâ€
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black holes...again
