dark matter causes the contraction of the universe and it accounts for most of the mass in our universe. i think you may mean dark energy, which causes expansion of space
x-ray jets are caused by friction, not surplus matter
there isn't a limit to how much matter can enter the event horizon of a black hole afaik
a quasar is an active blackhole/nucleus at the center of a galaxy
a gamma-ray burst is thought to be cause by supernova or neutron star collisions
here's how i understand the question because it's worded strangely
if matter enters a super massive blackhole at over 71 km/s, but still at a finite rate:
does it get larger, get pushed away from the shell, or expel matter?
the blackhole would get larger because it's absorbing matter, and it would also expel matter in the form of radiation. a quasar like object might result but there should be no gamma ray burst
depending on the mass of the black holes, the x-ray jets may or may not shift it.
however, radiation pressure is extremely small. by comparison, the momentum of the matter falling into the black hole is far more likely to shift the balance.
Ah, thanks. I posted fairly late at night so I may have misworded a few things. I meant dark energy, what I meant is what if the black hole itself was pushed into the matter, with the matter taking the form of a non-moving shell a few thousand light years thick around the edge of the universe. The black hole is moving toward the shell at 71 km/s from the outward expansion force of dark energy. My question was theoretically, what would happen if the supermassive black hole of a galaxy collided with such a shell. Let's use our own galactic nucleus as an example, if it was moving at that speed toward the shell, would the friction of the blackhole being pushed against such an enormous amount of matter be enough to halt the force of the blackhole being pushed at the shell at 71 km/s or something else?
Here's a poorly drawn picture of the scenario I am thinking of:
White: The universe inside of the hollow shell, about 720 billion light years across.
Brown: The material the shell is made of which is around 5,000 light years thick, composed mostly of silicate, carbon, iron, and various ices as well as a thick atmosphere of helium and hydrogen.
Black: The point where the material is so condensed that it is entirely composed of black holes, the friction of this reaches a balance preventing the universe from expanding or contracting.
Little Navy Blue Circle: The supermassive black hole heading toward the shell at 71 km/s, which is drastically small in comparison to the massive shell.
((Thanks for responding btw, I just realized who you were actually. I use your textures all the time, they're very useful.))