Interstellar gas heating by primordial black holes. Issue 3 (1st March 2022)

• Record Type: Journal Article
• Authors: Takhistov, Volodymyr; Lu, Philip; Gelmini, Graciela B.; Hayashi, Kohei; Inoue, Yoshiyuki; Kusenko, Alexander
• Is Part Of: Journal of cosmology and astroparticle physics. Volume 2022:Issue 3(2022)
• Publication Date: 2022-03-01
• Subjects: dark matter theory -- primordial black holes; Cosmology -- Periodicals; Astrophysics -- Periodicals; 523.0105
• DOI: 10.1088/1475-7516/2022/03/017
• Languages: English
• ISSNs: 1475-7516

Abstract

Abstract: Interstellar gas heating is a powerful cosmology-independent observable for exploring the parameter space of primordial black holes (PBHs) formed in the early Universe that could constitute part of the dark matter (DM). We provide a detailed analysis of the various aspects for this observable, such as PBH emission mechanisms. Using observational data from the Leo T dwarf galaxy, we constrain the PBH abundance over a broad mass-range, M PBH ∼ 𝒪(1) M ⊙ − 10 7 M ⊙, relevant for the recently detected gravitational wave signals from intermediate-mass BHs. We also consider PBH gas heating of systems with bulk relative velocity with respect to the DM, such as Galactic clouds.