5 ms·
The same reason the rest of the matter didn't collapse into black holes, not quite dense enough, or blowing up too fast. And dark matter doesn't have it's own k
by andrewflnr 4y ago
The same reason the rest of the matter didn't collapse into black holes, not quite dense enough, or blowing up too fast. And dark matter doesn't have it's own kind of black holes. Related is the idea of "primordial black holes".
- gpderetta 4y agoIn fact I think it is harder for dark matter to collapse into black holes because it can't easily shed momentum (angular of otherwise) and 'spiral down' .
- Beldin 4y agoThat's what i used to think, but GP alluded to weak interaction between DM particles. I thinkt interaction consumes energy. If so, DM particles would be able to shed some momentum... but then they (eventually) could clump into black holes.
- andrewflnr 4y agoAgain, no more than baryonic matter, which is demonstrably not all wrapped up in black holes (and probably much less, though bear in mind this is all pretty speculative). Of course any dark matter that happens to be headed straight for a black hole will go in, no problem. Broadly there are a lot more variables in black hole formation than just self-interaction. Remember it's possible in principle for photons to form a black hole, if you get them to converge just right, but that doesn't mean it's common or at all relevant on a cosmological scale.