Quasiextremal primordial black holes are a viable dark matter candidate
Physical review(2023)
Abstract
Black hole evaporation is generally considered inevitable for low-mass black holes, yet there is no confirmation of this remarkable hypothesis. Here, we propose a phenomenological model that appeals to the possible survival of light quasiextremal primordial black holes as a significant dark matter component and show that the related cosmological and astrophysical constraints disappear for reasonable degrees of quasiextremality. The results obtained are general, conservative, and should be taken as a proof of principle for future, model-specific analyses.
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Key words
viable dark matter candidate,dark matter,quasi-extremal
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