Question about Nuclear Black Hole and Galaxy Formation ?

First, I understood what you meant by nuclear, as in nucleus (of a galaxy).

Anyway, recent observations seem to indicate that the super-massive black holes formed after the earliest stars, but were in fact the "gravitational seed" around which galaxies formed.

I'm not sure what you mean by "nuclear black hole." The black holes at the centers of galaxies arose due to old stars collapsing and acquiring more and more mass.

Black holes and stars "co-evolve" only in the sense that the black hole gets larger as more stars are trapped inside it.

A black hollow is a great merchandise in a extremely small volume of area. whilst Einstein's equations for curved area-time are solved for a around symmetric mass distribution, a singularity looks whilst the ratio mass/radius will become better than the "serious" fee. (See additionally "Schwarzschild radius", etc.) for exterior observers, that's no longer accessible to chat with the interior the mass distribution. that's called a black hollow, by way of fact even lightrays from interior will by no skill have the capacity to attain exterior observers. on an identical time, black holes exert great forces of gravity on neighboring rely. by way of fact black holes shop on with from an extremely widespread concept of area, time and mass, they could exist in any length: purely cram a extremely great volume of rely in a sufficiently small room. the popular sort for stars predicts that heavy stars could fall down to develop right into a black hollow. Black holes as such are no longer seen, yet rely flowing right into a black hollow must be recognizable by way of fact of intense frequency radiation (e.g. X-rays). for this reason astronomers seek for X-ray radiation that should belong to a double action picture star gadget: the heavy area of the gadget could be a black hollow that sucks up rely from the small action picture star. by way of fact black holes continuously eat capability, it is not sparkling how they are able to be destroyed. in actuality, we don't be attentive to what happens with the capability it is trapped in a black hollow. Fantasies approximately "computer virus holes", parallel universes and "white holes" are thrilling for SF memories, yet no longer something is common. The nicely-be attentive to modern physicist Hawking is in touch in study of quantum consequences of black holes.

Yes, a lot of astronomers would like to know also. And I mean 'know' as in 250 -page PhD thesis.

The investigation is still going on

very confusing step. browse in a search engine. just that may help!

There is no such thing as "Nuclear Black Hole"

Check your data again. Repost please.