Spinning Primordial Black Holes from First Order Phase Transition

Abstract

We conduct a novel study to obtain the initial spin of the primordial black holes created during a first-order phase transition due to delayed false vacuum decay. Remaining within the parameter space consistent with observational bounds, we express the abundance and the initial spin of the primordial black holes as functions of the phase transition parameters. The abundance of the primordial black holes is extremely sensitive to the phase transition parameters. We also find that the initial spin weakly depends on all parameters except the transition temperature.

arXiv comment15 pages, 6 figures, 1 table; discussions updated, typos fixed; matches published version

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