All Questions
Tagged with black-holes singularities
54
questions with no upvoted or accepted answers
5
votes
2
answers
151
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Is the Schwarzschild singularity a limit of the Kerr singularity?
In a Schwarzschild black hole, the singularity is spacelike. In a Kerr black hole, it is timelike.
Is there any continuous transformation between those solutions? Can the Schwarzschild solution be ...
- 203
4
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0
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44
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Eigenvalues of the geodesic deviation equation, curvature invariants, and singularities
The geodesic deviation equation tells us what tidal forces freely falling observers experience in a local Lorentz reference frame. The tidal deformation tensor is
$$E^{\alpha}_{\gamma}=R^{\alpha}_{\...
- 572
4
votes
0
answers
221
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Merging black holes: from two singularities to a ring singularity?
In rotating black holes, the singularity is believed to be a ring or torus, unlike the single-point singularity of a non-rotating black hole.
Topological change - Imagine we have two distant black ...
- 71
3
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Hypothetically, could the interior of a black hole look exactly like the universe that surrounds us?
I do understand that we can't experimentally verify anything we imagine about the interior of a black hole.
If we were to apply what we know about the physics of the observable universe and assume ...
- 33
3
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answers
67
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Regular black hole with an evanescent horizon
I'm reading a great paper named Geodesically Complete Black Holes by R. Carballo, F. Filippo, S. Liberati and M. Visser about regular black holes and I'm trying to understand a particular situation. ...
- 403
3
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64
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Must collapse to a singularity proceed through a strong curvature singularity?
A strong curvature singularity (s.c.s.) can be defined as one for which a geodesic is incomplete at affine parameter $\lambda=0$, with $\lim_{\lambda\rightarrow0}\lambda^2R_{ab}v^av^b\ne0$, where $v^a$...
user4552
3
votes
0
answers
169
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No-hair theorems for naked singularities?
For black holes, we have no-hair theorems that say, under certain assumptions about the matter fields, that they are uniquely characterized by just a few parameters. Are there any such theorem for ...
user4552
3
votes
1
answer
352
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Do merging BHs have two or just one singularity?
There are a lot of questions about BH mergers on this site, and based on those, there are two main possibilities:
1.
Initially, the merged BHs, now a joint single BH, have two singularities, that ...
- 29k
3
votes
2
answers
418
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Gravitational singularity
Is it possible that the gravitational singularity actually turns out to be a genuine singularity once we have a true theory of quantum gravity in place? There is a lot of talk about singularity but ...
- 31
2
votes
0
answers
37
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Do the apparent infinities at the center of black holes disappear if instead a phase-change takes the place of its singularity?
When I watch physics documentaries that discuss black holes, they talk of impossible infinities in the singularity at a black hole's centre.
I was wondering about the bubbles of water vapour in ...
2
votes
1
answer
380
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Understanding the Kruskal diagram for Schwarzschild spacetime
I am studying Kruskal coordinates for my General Relativity course. On the book Spacetime and Geometry: An introduction to General Relativity by Sean Carroll, the author gives the metric in Kruskal ...
- 308
2
votes
0
answers
438
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How long from event horizont to singularity?
I was reading Quora answers. Someone asked how long it would take to get to the center of a black hole. Their answer (with no explanation or calculations) was 10 minutes for a Supermassive and 6 ...
- 2,706
2
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78
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Does tidal force continue to increase as a man falls into a black hole?
Small black holes have collosal tidal forces at their event horizons. But there are black holes large enough where a man can cross the event horizon without being ripped apart. But does the tidal ...
- 164
2
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0
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107
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How do singularities combine when two black holes combine?
If we solved GR in the case of two black holes colliding, does each individual black hole have a single pointlike singularity at their respective centres, and would those singularity combine?
Trying ...
user84158
1
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0
answers
50
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