Axion star nucleation in dark minihalos around primordial black holes
Abstract
We consider a general class of axion models, including the QCD and string axion, in which the PQ symmetry is broken before or during inflation. Assuming the axion is the dominant component of the dark matter, we discuss axion star formation in virialized dark minihalos around primordial black holes through gravitational Bose-Einstein condensation. We determine the conditions for minihalos to kinetically produce axion stars before galaxy formation. Today, we expect up to similar to 10(17) (similar to 10(9)) axion stars in a radius of 100 parsecs around the Sun for the case of the QCD (string) axion.
Main Authors
Format
Articles
Research article
Published
2020
Series
Subjects
Publication in research information system
Publisher
American Physical Society
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202008065503Käytä tätä linkitykseen.
Review status
Peer reviewed
ISSN
2470-0010
DOI
https://doi.org/10.1103/PhysRevD.102.023013
Language
English
Published in
Physical Review D
Citation
- Hertzberg, M. P., Schiappacasse, E. D., & Yanagida, T. T. (2020). Axion star nucleation in dark minihalos around primordial black holes. Physical Review D, 102(2), Article 023013. https://doi.org/10.1103/PhysRevD.102.023013
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Additional information about funding
T. T. Y. is supported in part by the China Grant for TalentScientific Start-Up Project and the JSPS Grant-in-Aid forScientific Research Grants No. 16H02176, No. 17H02878,and No. 19H05810 and by World Premier InternationalResearch Center Initiative (WPI Initiative), MEXT,Japan. M. P. H. is supported in part by National ScienceFoundation Grant No. PHY-1720332.
Copyright© 2020 American Physical Society