Constraining Primordial Black Holes with Dwarf Galaxy Heating

Lu, Philip and Takhistov, Volodymyr and Gelmini, Graciela B. and Hayashi, Kohei and Inoue, Yoshiyuki and Kusenko, Alexander (2021) Constraining Primordial Black Holes with Dwarf Galaxy Heating. The Astrophysical Journal Letters, 908 (2). L23. ISSN 2041-8205

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Abstract

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 ${ \mathcal O }(1){M}_{\odot }\mbox{--}{10}^{7}{M}_{\odot }$, relevant for the recently detected gravitational-wave signals from intermediate-mass BHs.

Item Type: Article
Subjects: European Repository > Physics and Astronomy
Depositing User: Managing Editor
Date Deposited: 16 May 2023 04:45
Last Modified: 20 Jan 2024 10:06
URI: http://go7publish.com/id/eprint/2265

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