I'm not sure if this has been proven or disproven, but here goes anyway...!
I have reason to believe that supermassive black holes in the centre of every galaxy aren't the remnants of a single or a few massive stars.
Why?
Now we all know that stars with a mass from typically 5<m(suns)>18, form neutron stars or pulsars- ultra-dense remnants of stars with a typical density ratio of
1 grain of sand sized piece of Neutron Star: Mass of Manhattan Island.
So stars with a mass of 18<m(suns)>149(?) form black holes due to intense pressure from outer layer matter of the star and the reaction force of outwards expended supernova matter...
Now, I've read many articles that suggest that stars with a mass of >150 of our sun don't become black holes, now I don't know why this is, perhaps someone can explain.
So taking this into account, supermassive black holes cannot have come from a truly massive star as it would've been too massive to become a black hole. The only way a supermassive black hole could've been formed from stars is if there was a large cluster of massive stars (that could turn into black holes) that all 'died out' at around the same time. I'm not sure if there are other more likely explanations for Supermassive black hole formation- I know that for a black hole to form, two masses of mass M must get closer to each other than a distance of 4GM/c^2, I think...
Could someone, or many people, please clarify these topics for me? It would be much appreciated...
Please go easy on me though, don't just say 'nonsense' to everything I've put. I'm only 16 years old and don't have the experience that many of you probably have...
(You may have noticed that in my introduction post a few days ago, it stated that I had a phD etc etc. Obviously this is nonsense, and I didn't put that- it was my brother messing around when I had to go away from my laptop! Sorry...!)
Thanks,
- x(x-y)