Axion dark matter decay injects 1-13.6 eV photons that suppress H2, enabling atomic cooling halos and direct collapse black hole seeds for axion masses 24.5-26.5 eV and couplings down to 4e-12/GeV.
First detection of an over-massive black hole galaxy: Uhz1–evidence for heavy black hole seeds from direct collapse?
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Stellar-mass primordial black holes have minor impact on primordial star formation while supermassive ones can seed massive early structures explaining apparent overabundance of high-redshift galaxies.
citing papers explorer
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Direct Collapse Black Hole Candidates from Decaying Dark Matter
Axion dark matter decay injects 1-13.6 eV photons that suppress H2, enabling atomic cooling halos and direct collapse black hole seeds for axion masses 24.5-26.5 eV and couplings down to 4e-12/GeV.
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Impact of primordial black holes on the formation of the first stars and galaxies
Stellar-mass primordial black holes have minor impact on primordial star formation while supermassive ones can seed massive early structures explaining apparent overabundance of high-redshift galaxies.