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If the singularity is of quasi zero dimensions then its peripheral speed must be superluminal ?

Quote from: syhprum on 30/05/2011 18:15:14If the singularity is of quasi zero dimensions then its peripheral speed must be superluminal ?The potential for superluminal rotation has bothered me as well.If I recall correctly, the concept of the ergosphere is that it is the region of space surrounding a rotating black hole where the rotation cannot be resisted. I believe the idea is that it is because the frame-dragging effect of the singularity causes space to be pulled around the black hole at or exceeding the speed of light in this region. Logically, the singularity must be spinning even faster than that...surely I've misunderstood something.

And now I will disagree, the EV is what lies inside SpaceTime as I see it. The rest are theories over what lies behind. That is, if we by SpaceTime define where all physics experiments are expected to deliver us the same outcomes? Although maybe? Maybe we can expect a same physics inside the EV?

Simple, as I know it we have strong evidence for massive Black Holes, but we define the EV as the last place we can do any measuring on. Is that wrong?

Very often on NS they've talked about spinning black holes. A black hole is not an object in the way a planet or star is, rather it's a region of space so highly curved that it is curved back on itself, so what, exactly, is spinning?

The term "singularity" in reference to black holes is a very bad misnomer. For a non rotating (entirely theoretical) Swartschild black hole it just means, "we have not got a model to describe it" and not a mathematical point. For a "rotating" black hole, that is one containing angular momentum, that is all the black holes that have ever formed in our universe outside of the Cosmic Microwave Background observational limit, the Kerr solution applies, where the mass is in the form of a ring rotating at the velocity of light. This does in fact mean that any black hole can only absorb a limited amount of angular momentum otherwise the ring would get bigger than the event horizon.

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