Papers › Dark Bondi Accretion Aided by Baryons and the Origin of JWST Little Red Dots
Dark Bondi Accretion Aided by Baryons and the Origin of JWST Little Red Dots
Wei-Xiang Feng, Hai-Bo Yu, Yi-Ming Zhong
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The gravothermal core collapse of self-interacting dark matter halos provides a mechanism for seeding supermassive black holes in the early Universe. We show that the collapse of a small fraction of the halo mass can trigger general-relativistic instability and produce black hole seeds in halos with masses ≳10⁹ M_⊙ at high redshift. We investigate whether this process can account for the origin of JWST little red dots at z∼4-11, which host black holes with masses ∼10⁷ M_⊙. We find that such masses can be reached within ∼500 Myr through rapid core collapse followed by efficient accretion, even for initial seed masses of 1-10³ M_⊙. This scenario allows a substantial fraction of the black hole mass to originate from dark matter accretion, potentially offering a viable pathway to forming massive black holes at high redshift.
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