Aseyhe t1_j2ot4uq wrote on January 2, 2023 at 10:27 PM

Reply to comment by BrobdingnagLilliput in How do galaxies move? by modsarebrainstems

Supermassive black holes form because of galaxies, not the reverse.

It has been suggested that supermassive black holes might form from "seed" primordial black holes, which would have existed before galaxies. But even then, it's the galaxy-scale initial density variations that allow galaxies to form around these seeds and grow them to supermassive scales.

BrobdingnagLilliput t1_j2ovrhh wrote on January 2, 2023 at 10:45 PM

Well, now my curiosity is piqued! I think I understand how ordinary black holes form as a result of stellar evolution, but can you point me to some decent resources on supermassive black hole formation? I'd prefer something closer to a book than a web page.

Aseyhe t1_j2ozfc3 wrote on January 2, 2023 at 11:09 PM

There's a very nice recent review article about the origins of massive black holes.

[deleted] t1_j2pqeqj wrote on January 3, 2023 at 2:14 AM

[removed]

StandardSudden1283 t1_j2pbegv wrote on January 3, 2023 at 12:31 AM

What do you think about the idea that supermassive black holes at the center of galaxies were one the first generation of stars? Additionally, what do you think about black hole stars?

deja_entend_u t1_j2qkfok wrote on January 3, 2023 at 6:13 AM

Given the sheer SIZE of supermassive black holes and how quickly the formed post the big bang it seems there are great odds of SMBHs coming from some MEGA big stars that collapsed very quickly. Problem is to my knowledge we've never observed a star big enough to collapse INTO a supermassive black hole.

https://phys.org/news/2021-03-massive-stars-early-universe-progenitors.html#:~:text=The%20leading%20theory%20suggests%20the,into%20supermassive%20black%20holes%20today.

We would have to look back far enough to a now VERY distant galaxy to observe such a massive stars collapsing and merging. Hopefully JWST can confirm them!!

Regarding black hole stars: https://www.youtube.com/watch?v=aeWyp2vXxqA&t=609s

I think black hole stars could well be the origin of some of the supermassive black holes if a whole bunch could smash together!

choicemeats t1_j2p4srj wrote on January 2, 2023 at 11:45 PM

I just watched a video about the concept of black hole stars and the theory is honestly fascinating.