Axion star nucleation in dark minihalos around primordial black holes
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
Published inPhysical Review D
© 2020 American Physical Society
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.
PublisherAmerican Physical Society
Publication in research information system
MetadataShow full item record
Additional information about fundingT. 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.
Showing items with similar title or keywords.
Radio signatures from encounters between neutron stars and QCD-axion minihalos around primordial black holes Nurmi, Sami; Schiappacasse, Enrico D.; Yanagida, Tsutomu T. (IOP Publishing, 2021)Probing the QCD axion dark matter (DM) hypothesis is extremely challenging as the axion interacts very weakly with Standard Model particles. We propose a new avenue to test the QCD axion DM via transient radio signatures ...
Implications for dark matter direct detection in the presence of LIGO-motivated primordial black holes Hertzberg, Mark P.; Schiappacasse, Enrico D.; Yanagida, Tsutomu T. (Elsevier, 2020)We discuss formation of dark matter (DM) mini-halos around primordial black holes (PBHs) and its implication on DM direct detection experiments, including axion searches. Motivated by LIGO observations, we consider fDM≃0.01 ...
Cangialosi, Antonino (2019)Primordial Black Holes (PBH) may have formed from collapse of high-density primordial fluctuations in the early Universe. Interest for PBH has been stirred anew by the LIGO detection of gravitational waves from massive ...
Kainulainen, Kimmo; Nurmi, Sami; Schiappacasse, Enrico D.; Yanagida, Tsutomu T. (American Physical Society (APS), 2021)Primordial black holes (PBHs) are one of the most interesting nonparticle dark matter (DM) candidates. They may explain all the DM content in the Universe in the mass regime from about 10−14 M⊙ to 10−11 M⊙. We study PBHs ...
Hertzberg, Mark P.; Nurmi, Sami; Schiappacasse, Enrico D.; Yanagida, Tsutomu T. (American Physical Society, 2021)We study the well-motivated mixed dark matter (DM) scenario composed of a dominant thermal WIMP, highlighting the case of SU(2)L triplet fermion “winos,” with a small fraction of primordial black holes (PBHs). After the ...