More Axion Stars from Strings

We show that if dark matter consists of QCD axions in the post-inflationary scenario more than ten percent of it efficiently collapses into Bose stars at matter-radiation equality. Such a result is mostly independent of the present uncertainties on the axion mass. This large population of solitons,...

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Bibliographic Details
Published in:arXiv.org 2024-08
Main Authors: Gorghetto, Marco, Hardy, Edward, Villadoro, Giovanni
Format: Article
Language:English
Subjects:
Dark matter
Hypothetical particles
Phenomenology
Solitary waves
Online Access:Get full text
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Summary:We show that if dark matter consists of QCD axions in the post-inflationary scenario more than ten percent of it efficiently collapses into Bose stars at matter-radiation equality. Such a result is mostly independent of the present uncertainties on the axion mass. This large population of solitons, with asteroid masses and Earth-Moon distance sizes, might plausibly survive until today, with potentially interesting implications for phenomenology and experimental searches.
ISSN:2331-8422