More axion stars from strings
A bstract 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.
Authors
- Marco Gorghetto (ORCID: https://orcid.org/0000-0002-5479-485X)
- Giovanni Villadoro (ORCID: https://orcid.org/0000-0002-7204-8236)
- Edward Hardy (ORCID: https://orcid.org/0000-0003-3263-6575)
Institutions
- The Abdus Salam International Centre for Theoretical Physics (ICTP) (IT)
- Deutsches Elektronen-Synchrotron DESY (DE)
- Center for Theoretical Physics (PL)
- University of Oxford (GB)
Publication Details
- Journal
- Journal of High Energy Physics
- Published
- 2024-08-16
- DOI
- https://doi.org/10.1007/jhep08(2024)126
- Citations
- 31
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 20.45
Funders
- Alexander von Humboldt-Stiftung
- Deutsche Forschungsgemeinschaft
- Abdus Salam International Centre for Theoretical Physics
- Science and Technology Facilities Council