All Questions
Tagged with frame-dragging kerr-metric
11
questions
3
votes
1
answer
311
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Are rotating black holes producing a frame dragging effect inside the event horizon?
Are rotating black holes producing a frame dragging effect inside the event horizon? Is that effect moving space inside the event horizon at speeds far greater than the speed of light?
- 2,255
1
vote
1
answer
163
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What spins as a black hole? (lame question) [duplicate]
Obviously I am not a physicist.
I have seen What is black hole spin?
but this is not what puzzles me.
If I understand correctly, black hole has only three features (please correct me):
angular ...
- 239
2
votes
0
answers
50
views
Equivalence Principle Frame Dragging
Why do metric equations of a rotating body (like Kerr Metric for black holes or EFE solution for rotating bodies) contain a dt dphi term, leading to rotational frame dragging effects? Please don't ...
- 1,161
0
votes
0
answers
59
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If a very massive object enters in a rotating black hole retrograde orbit should it slow down the black hole's spin?
If a very massive object is orbiting retrograde around a rotating black hole, would it slow down the black hole's spin? Of course, due to its interaction with the black hole's rotating frame, better ...
- 2,255
10
votes
4
answers
999
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Does the twist of spacetime by a black hole increase over time?
From the Wikipedia page about Ergospheres:
As a black hole rotates, it twists spacetime in the direction of the rotation...
Does this "twisting up spacetime" add up over time in any ...
- 163
0
votes
1
answer
79
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Can the curvature of space-time be also described as a 'frame' (space) whirlpool?
Can the curvature of space-time be also described as a 'frame' (space) wirlpool?
When we talk about the Schwarzschild metric it can be immagined as a curved manifold but in the Kerr metric it seams ...
- 1,815
1
vote
0
answers
31
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What is the relative importance of the Coriolis term to the precession term in frame dragging by rotating Kerr black holes?
The Wikipedia entry for Thirring precession describes the Coriolis term as separate from the precession term. Is it fair to say that when looking at the dynamics of a rotating black hole, the ...
- 480
0
votes
0
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70
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Spin rotation of masses in a rotating gravitational field around a black hole
If a rotational gravitational field affects masses in the way the frame and body velocities are added together does it mean that as the rotation of the frame has a gradient of the perpendicular ...
- 2,255
6
votes
1
answer
417
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Gravitational lensing redshift around a Kerr black hole
Light from a source passes by a Kerr black hole on two sides at the equator and converges at the observer. The axis of rotation of the black hole is perpendicular to the direction of light. Two rays ...
- 12.7k
5
votes
3
answers
781
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How can a black hole rotate if time dilation stops time at the event horizon?
How does a black hole rotate if time is dilated to infinity (e.g. stopped) at the event horizon? Note: this is relevant to this question, but different: How can a singularity in a black hole rotate ...
- 213
2
votes
4
answers
1k
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The physical meaning of the cross-term of Kerr metric
I have been experimenting with different types of metric tensors in General Relativity. I decided to try my hand with the Kerr Metric. When I did, I found an odd term in it: namely, a cross product of ...
- 3,967