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Anonymous
another black hole thread: rotation 2017-08-09 01:20:55 Post No. 9094433
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another black hole thread: rotation 2017-08-09 01:20:55 Post No. 9094433
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If they're a singularity what does rotating mean for them?
Supposedly the solution is that rotating black hole 'singularities' are actually circular. But what stops a circular singularity collapsing to a point?
And whatever the singularity is like, how do the effects of any spinning it does make it outside the event horizon to distinguish it from a non-rotating black hole from the outside?
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>>9094433
Ergosphere
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>>9094433
Conservation of angular momentum keeps it spinning.
It appears different because of frame dragging, where it literally pulls space around it (causing objects to be pulled around it as well as towards it). This causes it to lose its angular momentum slowly though.
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This is going to sound retarded and probably is, but suppose that the spin dissapears as it becomes a point mass: whatever is spinning around it would maintain angular momentum, and possibly through some sort of black magic bullshit, even gain it, meaning there's still rotating mass about the singularity.
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