Constraining Primordial Black Holes with Dwarf Galaxy Heating
[1];
[3];
[4];
[2]
- Univ. of California, Los Angeles, CA (United States)
- Univ. of California, Los Angeles, CA (United States); Univ. of Tokyo (Japan). Kavli Institute for the Physics and Mathematics of the Universe (WPI)
- Univ. of Tokyo (Japan); Tohoku Univ., Sendai (Japan)
- Univ. of Tokyo (Japan). Kavli Institute for the Physics and Mathematics of the Universe (WPI); Osaka Univ. (Japan)
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.
- Research Organization:
- Univ. of California, Los Angeles, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC) High Energy Physics (HEP)
- Grant/Contract Number:
- SC0009937
- OSTI ID:
- 1836642
- Alternate ID(s):
- OSTI ID: 1905678; OSTI ID: 1905679
- Journal Information:
- The Astrophysical Journal. Letters, Vol. 908, Issue 2; ISSN 2041-8205
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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