Origin of Galaxies and Super Massive Black Holes

  • #26
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There certainly is a supermassive something there in the case of own galaxy because stars are orbiting it.
An object as massive as that doesn't fit any other description, and relativity predicts a black hole must be the state of any object that massive,.
SMBH also is the only plausible mechanism we know of that can explain quasars.
 
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  • #27
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Is there any scientific doubt that these supermassive objets at the center of galaxies are in fact black holes?
There seems to be very little doubt. The question is, how did these SMBH form in such a short period? They would have only had approximately 600 million years since the Big Bang to form. Mergers of individual stellar black holes, into intermediate "seed" black holes, seems to be an unlikely explanation because of the amount of time it would take. Extremely dense proto-galaxy collisions, or some other mechanism that we have not yet determined, may explain a faster method for achieving SMBH status in such a short period of time.
 
  • #28
Chronos
Science Advisor
Gold Member
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This appears to support the direct collapse model.
 

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