Additionally, there’s no reason to assume that all dark matter is just one thing. There could be multiple things going on, as long as most of the things going on don’t self-interact.
Heck, for that matter there could be a small (!) dark sector that DOES self-interact as long as its total mass was within the error bars for baryonic mass inferred from primordial nucleosynthesis.
Additionally, there’s no reason to assume that all dark matter is just one thing. There could be multiple things going on, as long as most of the things going on don’t self-interact.
Heck, for that matter there could be a small (!) dark sector that DOES self-interact as long as its total mass was within the error bars for baryonic mass inferred from primordial nucleosynthesis.