|MadSci Network: Astronomy|
When light falls into a black hole, its energy is absorbed as a mass increase with corresponding increase in the event horizon. Why not the rotational energy of matter in the collapsing star? If a spinning top were thrown into a black hole, I don't picture its "immune" angular momentum being conserved. I would expect it to convert to "mass" instead of adding to/subtracting from the hole's rotation. How does spinning matter in the top differ from the spinning matter in the star as it collapses? What is the "rpm" of an object with a radius of zero? Seems like it should be infinite or zero. So equal massed stars, one with fast rotation, one with almost none have the same rate of rotation when they become black holes? Clearly I'm not grasping some things here. Thanks in advance for any input!
Re: Collapsing star angular momentum converted to mass
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