A1 Journal article (refereed)
Axion star nucleation in dark minihalos around primordial black holes (2020)

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

JYU authors or editors

Publication details

All authors or editors: Hertzberg, Mark P.; Schiappacasse, Enrico D.; Yanagida, Tsutomu T.

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2020

Volume: 102

Issue number: 2

Article number: 023013

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.102.023013

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/71358

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2001.07476

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.

Keywords: particle physics; nuclear physics; black holes

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2