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Accreting Primordial Black Holes as Dark Matter Constituents

T. Kenneth FowlerRichard Anantua
Mar 2023
摘要
We show how magnetic accretion of positronium (electron-positron) plasma byprimordial black holes might significantly contribute to the mass of darkmatter in the present Universe. Assuming that background gamma radiation isprimordial black hole Hawking radiation rules out Bondi accretion, whilemagnetic accretion known from studies of active galactic nuclei could explainthe abundance of dark matter. Various accretion scenarios are discussed.
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