Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 3, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2022/03/017
Keywords
dark matter theory; primordial black holes
Funding
- U.S. Department of Energy (DOE) [DE-SC0009937]
- MEXT [20H01895, 21K13909]
- Japan Society for the Promotion of Science (JSPS) KAKENHI [JP20H05853]
- JSPS KAKENHI [JP18H05458, JP19K14772]
- program of Leading Initiative for Excellent Young Researchers, MEXT, Japan
- RIKEN iTHEMS Program
- World Premier International Research Center Initiative (WPI) , MEXT, Japan
- Grants-in-Aid for Scientific Research [20H01895, 21K13909] Funding Source: KAKEN
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This study provides a detailed analysis on the various aspects of interstellar gas heating, including PBH emission mechanisms and constraints on the PBH abundance for different mass ranges. Observational data from the Leo T dwarf galaxy is used to constrain the PBH abundance relevant to intermediate-mass BHs. The study also considers PBH gas heating in systems with bulk relative velocity to the DM.
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 similar to O(1)M-circle dot - 10(7) M-circle dot, 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.
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