Black hole feeding frenzy discovered that breaks records
A giant black hole ripped apart a nearby star and then continued to feed off its remains for close to a decade, according to research. This black hole meal is more than 10 times longer than any other previous episode of a star’s death. Ref. Source 2y.
Supermassive black holes found in two tiny galaxies
Astronomers have found two ultra-compact dwarf galaxies with supermassive black holes, the second and third such galaxies found to harbor the objects. Together, the three examples suggest that black holes lurk at the center of most ultra-compact dwarfs, potentially doubling the number of supermassive black holes known in the universe. The tiny galaxies were likely leftovers of larger galaxies stripped of their outer layers after colliding into other, larger galaxies. Ref. Source 8q.
So if it's a collision how about this for an explanation. Galaxies collide and as they do one galaxy moves through the other one, getting pushed into a smaller and smaller space and picking up speed as it goes. This creates a hole in the other galaxy. As the galaxy ripping through gets smaller it also becomes denser. This becomes the massive black hole. It also acts as a force to suck the galaxy it's moving through into itself, almost sucking the poor galaxy that's been collided with into itself. This is why that galaxy seems like a dwarf.
This would be akin to what happens when an anti tank round hits a tank. It drills through and is moving so fast it sucks air, shrapnel, and superheated metal in with it.
Scientists make waves with black hole research: Water bath simulation. Scientists have made a significant leap forward in understanding the workings of one of the mysteries of the universe. They have successfully simulated the conditions around black holes using a specially designed water bath. Source 5t.
Cosmic magnifying lens reveals inner jets of black holes. Jet material ejected from a black hole is magnified in new observations from Caltech's Owens Valley Radio Observatory. This discovery provides the best view yet of blobs of hot gas that shoot out from supermassive black holes. Source 5z.
Physicists propose new theories of black holes from the very early universe. 'Primordial black holes,' believed to have formed shortly after the Big Bang, might explain how heavy elements such as gold, platinum and uranium came to be, physicists report. Source 2k.