I Formation of super-massive black holes

[Green dwarf]

It seems that the super-massive black holes at the centres of galaxies formed very early in the history of the galaxies (e.g ULAS J1342+0928, which had about 800 million solar masses 13.1 billion years ago).
Presumably, in the very early days, matter in the universe was much less clumped than it is now and dark and light matter would have been more evenly mixed. When regions of higher matter density started to nucleate into galaxies, the parts with high angular momentum relative to the nucleus would have gone into orbit and eventually formed accretionary disks, while the parts with low angular momentum would have fallen more directly and quite quickly into the nucleus. This matter might then have formed a single 'star'. This 'star' might have become very massive (many thousands of solar masses) before having time to be disrupted by supernova explosions or the like. Also, the fact that the material would have been mostly dark matter might have caused it to approach supernova readiness more slowly and photodisintegration of helium nuclei might also have helped stave off supernova explosion.
Is this feasible? If so, could such a 'star' have reached a sufficient mass for the centre to become dense enough to produce a black hole before any supernova-type explosion occurred? And, if so, would this allow for the very early and fast production of super-massive black holes?

 

[trurle]

You are talking about "direct collapse" black hole formation route.
Example references:
https://arxiv.org/pdf/1801.08545.pdf
https://academic.oup.com/mnras/article/370/1/289/1026607

 

[Green dwarf]

Thanks trurle. Once I knew this was called 'direct collapse', I could find plenty written about it.