6533b874fe1ef96bd12d6142
RESEARCH PRODUCT
Axion star nucleation in dark minihalos around primordial black holes
Mark P. HertzbergEnrico D. SchiappacasseEnrico D. SchiappacasseEnrico D. SchiappacasseTsutomu T. Yanagidasubject
Cosmology and Nongalactic Astrophysics (astro-ph.CO)Physics::Instrumentation and DetectorsDark matterFOS: Physical sciencesmustat aukotPrimordial black holeGeneral Relativity and Quantum Cosmology (gr-qc)Astrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicshiukkasfysiikka01 natural sciencesGeneral Relativity and Quantum CosmologyGravitationHigh Energy Physics::TheoryHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesGalaxy formation and evolution010306 general physicsAxionAstrophysics::Galaxy AstrophysicsPhysicsInflation (cosmology)010308 nuclear & particles physicsStar formationHigh Energy Physics::PhenomenologyHigh Energy Physics - PhenomenologyStarsydinfysiikkaAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
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 $\sim 10^{17}$ ($\sim 10^9$) axion stars in a radius of 100 parsecs around the Sun for the case of the QCD (string) axion.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-21 | Physical Review D |