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Thread: Supermassive Black Holes

  1. #1 Supermassive Black Holes 
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    I would like to address one issue with super massive black holes and that is. How did they come to be? We know enough about normal stellar black holes but how about the giants at the center of our galaxy's.

    Firstly lets remind ourselves how normally sized black holes are formed. A giant star such as a blue super giant or red giant finally reach the end of their lifespan and die in a supernova where the star implodes into itself. Four scenarios are then introduced,
    1:The star enters the supernova stage and explodes normally excluding all its mass into energy
    2:The star implodes and a neutron star is formed
    3:The star(which would have to be of huge mass) implodes and its matter is so dense at its center it forms a singularity which is the heart of a black hole, after that is formed the event horizon begins to form and expand depending on the mass in the singularity
    4:The star implodes and forms a neutron star which after time becomes unstable and implodes to form a black hole

    My theory on the creation of super-massive black holes is that at the start of the universe the infamous big bang occurred, now as the universe began to expand it was as you can imagine not so big but all the matter(and if it does exist dark energy and matter) was all stored in the small space of the expanding universe, so it would be extremely dense forming many black holes. These black holes stuck around growing with age, feeding off the helium and hydrogen in the early universe and slowly growing with size, and when the first stars formed and planets e.t.c these giants that had been feeding for millions of years of course were so dense that they attracted all the stars and planets dust clouds and more around them.

    I would like to know your theory's as well so please reply your theories or comments on mine or others


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  3. #2  
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    Quote Originally Posted by spectre View Post
    I would like to address one issue with super massive black holes and that is. How did they come to be? We know enough about normal stellar black holes but how about the giants at the center of our galaxy's.

    Firstly lets remind ourselves how normally sized black holes are formed. A giant star such as a blue super giant or red giant finally reach the end of their lifespan and die in a supernova where the star implodes into itself. Four scenarios are then introduced,
    1:The star enters the supernova stage and explodes normally excluding all its mass into energy
    2:The star implodes and a neutron star is formed
    3:The star(which would have to be of huge mass) implodes and its matter is so dense at its center it forms a singularity which is the heart of a black hole, after that is formed the event horizon begins to form and expand depending on the mass in the singularity
    4:The star implodes and forms a neutron star which after time becomes unstable and implodes to form a black hole
    No. Both neutron stars and stellar black holes are formed by supernovae events. It is not a matter of either a supernova or the formation of a black hole. Not all the mass of the exploding star is blown away and it is the remnant that forms either. As to which is formed, this depends on the mass of the star.

    The forth scenario could only come about through a neutron star accumulating enough mass to force a collapse, since the largest observed neutron stars are ~2 stellar masses and the smallest BH is ~5 solar masses, a neutron star would need to accumulate a great deal of mass to collapse to a black hole (~ 2.5 times its initial mass). There are hypothetical intermediate types of stars that fall between these two (quark stars and electroweak stars), but neither have been detected at this time.


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    The heated mind resents the chill touch & relentless scrutiny of logic"-W.E. Gladstone


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  4. #3  
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    Here check out this link: Here's How Supermassive Black Holes May Have Grown So Big In The Early Universe
    It's a theory to explain your above question, have fun!
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