Laha, R and Lu, P and Takhistov, V (2021) Gas heating from spinning and non-spinning evaporating primordial black holes. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 820 .
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Abstract
Primordial black holes (PBHs) from the early Universe constitute a viable dark matter (DM) candidate and can span many orders of magnitude in mass. Light PBHs with masses around 1015 g contribute to DM and will efficiently evaporate through Hawking radiation at present time, leading to a slew of observable signatures. The emission will deposit energy and heat in the surrounding interstellar medium. We revisit the constraints from dwarf galaxy heating by evaporating non-spinning PBHs and find that conservative constraints from Leo T dwarf galaxy are significantly weaker than previously suggested. Furthermore, we analyze gas heating from spinning evaporating PBHs. The resulting limits on PBH DM abundance are found to be stronger for evaporating spinning PBHs than for non-spinning PBHs. © 2021 The Author(s)
| Item Type: | Journal Article |
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| Publication: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Publisher: | Elsevier B.V. |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Department/Centre: | Division of Physical & Mathematical Sciences > Centre for High Energy Physics |
| Date Deposited: | 14 Sep 2021 11:26 |
| Last Modified: | 14 Sep 2021 11:26 |
| URI: | http://eprints.iisc.ac.in/id/eprint/69589 |
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