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Gas Heating from Spinning and Non-Spinning Evaporating Primordial Black Holes

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arxiv 2009.11837 v3 pith:6ZQ3CODQ submitted 2020-09-24 astro-ph.CO astro-ph.HEhep-phhep-th

Ranjan Laha , Philip Lu , Volodymyr Takhistov This is my paper · ORCID
classification astro-ph.COastro-ph.HEhep-phhep-th
keywords pbhsevaporatingheatingnon-spinningspinningblackconstraintsdwarf
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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 $10^{15}$ 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 analyse 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.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Page Time of Primordial Black Holes in the Standard Model and Beyond

    astro-ph.CO 2025-02 conditional novelty 6.0 of 10

    For Standard Model emission, a Schwarzschild primordial black hole of about 6.23 x 10^14 grams would reach its Page time at the current age of the Universe.

  2. Enlightening dark moments of neutrino with superradiance

    hep-ph 2026-08 conditional novelty 5.0 of 10

    Quenched superradiance of dark photon clouds around spinning primordial black holes could turn neutrino electromagnetic moment bounds into observable neutrino fluxes and limits on PBH abundance.

  3. Searching for Dark Matter with MeVCube

    hep-ph 2025-01 conditional novelty 4.0 of 10

    Using Fisher forecasting, the author shows that a 2U to 12U MeVCube CubeSat could probe new dark matter parameter space for evaporating primordial black holes and MeV-scale decaying or annihilating dark matter.

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