Title: Constraining Primordial Black Holes with Dwarf Galaxy Heating.
Authors: Philip Lu, Volodymyr Takhistov, Graciela B. Gelmini, Kohei Hayashi, Yoshiyuki Inoue, Alexander Kusenko
Black holes formed in the early universe, prior to the formation of stars, can exist as dark matter and also contribute to the black hole merger events observed in gravitational waves. We set a new limit on the abundance of primordial black holes (PBHs) by considering interactions of PBHs with the interstellar medium, which result in the heating of gas. We examine generic heating mechanisms, including emission from the accretion disk, dynamical friction, and disk outflows. Using the data from the Leo T dwarf galaxy, we set a new cosmology-independent limit on the abundance of PBHs in the mass range O(1)M_sun-10^7M_sun, relevant for the recently detected gravitational wave signals from intermediate-mass BHs.
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- Our paper on the coronal cosmic-ray energy budget in AGNs is accepted by PASJ.
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- Our paper on multi-epoch X-ray spectral analysis of Cen A is accepted by PASJ.
- Our paper on radio emission from AGN disk winds is accepted by ApJ.
- Our paper on Millimeter Time Variability in the Gamma-Ray Detected Seyfert Galaxy GRS 1734-292 is accepted by ApJ.