I am working on the properties of black holes which needs an answer to this question.
Do you think a black hole could be a source of lambda, the cosmological constant, or affecting on it by increasing or decreasing?
No, I don't think black hole can be a source of lambda. But the way it curves space-time may create a de-Sitter space-time near the event horizon.
The space-time of the Universe is caused by de Sitter space with positive lambda. The space is fulled by vacuum with positive density ro = 3/kappa a^2, where kappa is Einstein constant, a is the radius of the Universe. The Universe in this case is the collapsar, for which Hilbert radius r_g = a. The same structure possesses neutron stars.
Hi Larissa,
Thanks for your response.
So can I assume that the same structure follows for black holes too because further shrinking of a neutron star will not cause any radical change to the structure of space-time?
Further, if the structure of black hole is de-Sitter, then I don't see a logical reasoning to avoid the Einstein-Rosen bridge. We can't just rule it out due to lack of evidence. Can we?
Is it possible that the boundary of a black hole is de-sitter while the interior has anti-de-sitter geometry?
“In Ferent Quantum Gravity riding alongside a light beam you will see the Planck length”
Adrian Ferent
That is why:
“There are not Black Holes at Planck wall”
Adrian Ferent
“What you learned from your professors, from your books, from the greatest scientists… about Black Holes is wrong”
Adrian Ferent
https://www.researchgate.net/publication/328942808_Einstein_did_not_explain_the_photoelectric_effect_There_are_not_Black_Holes_at_Planck_wall
It is neither, the geometry for a single black hole is the Scwarzschild Metric (or Kerr if rotating). For a simple black hole embedded in a de-Sitter universe, you can use the McVittie metric. For more complex black holes, see this article:
https://www.sciencedirect.com/science/article/pii/S0370269304009074
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