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   powersoffour (powersoffour@mastodon.social)'s status on Friday, 30-Aug-2024 03:37:35 JST powersoffour

   in reply to

   • Fraser Cain

   @fraser This is an exciting theory that builds on so many different aspects of early universe star formation. I spent a fair bit of time in grad school investigating neutralino self-annihilation as a mechanism for this, as there is a range of parameters for which the x-rays it would emit in self-annihilation would dissociate H2. The chemistry in the early universe is so cool and has so much impact on the fluid dynamics.

   (That project was based on work that Kusenko was involved in, too.)

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     Fraser Cain (fraser@m.universetoday.com)'s status on Friday, 30-Aug-2024 03:37:36 JST Fraser Cain

     A longstanding mystery in astronomy is the growth of supermassive black holes early in the Universe. Within a few hundred million years of the Big Bang, some black holes were already approaching a billion solar masses. The problem is that hydrogen heats up as it collects, pushing away new material that could be added to a star, limiting its mass. Researchers think that early dark matter could have kept hydrogen from cooling, allowing more to collect into a small region.

     https://newsroom.ucla.edu/releases/dark-matter-helped-make-supermassive-black-holes-in-the-early-universe