More Axion Stars from Strings
High Energy Physics - Phenomenology
2024-08-22 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
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.
Keywords
Cite
@article{arxiv.2405.19389,
title = {More Axion Stars from Strings},
author = {Marco Gorghetto and Edward Hardy and Giovanni Villadoro},
journal= {arXiv preprint arXiv:2405.19389},
year = {2024}
}
Comments
23 pages + appendices