Re: Could a Binary Star system create a black hole w/o a singularity?
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No. Black holes are theoretically formed based on mass density, not net mass. Star A + Star B = some arbitrary mass, but unless the mass is at a high enough density in space it does not create an event horizon.
A rotating black hole does however have an ellipsoid shaped event horizon.
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Does that necessarily imply 2 singularities? And is that the only way that we can tell that they're rotating?
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No, rather it has to do with frame-dragging, a relativistic effect.
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