"However, if there are dark matter self-interactions, what happens is this energy is redistributed between the particles in the central region of the galaxy so that the dark matter is not dispersed away," Alonso-Álvarez added. "This is crucial."

but "more black holes" does not seem to account for the way black hole mergers actually take place.

the hypothesis is that dark matter gravity and dark matter self interaction facilitate the "viscous-fluid" energy loss to spiral the black hole objects into a merger.

true? no clue. but we keep seeing effects of "dark matter" that are not easily explained by anything we are currently understand.

[–] CaptainSpaceman 3 points 5 months ago

Ive been thinking maybe dark energy is the fluid our universe swims in