Interstellar Gas Heating by Primordial Black Holes. (arXiv:2105.06099v2 [astro-ph.GA] UPDATED)

Interstellar Gas Heating by Primordial Black Holes. (arXiv:2105.06099v2 [astro-ph.GA] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Takhistov_V/0/1/0/all/0/1">Volodymyr Takhistov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lu_P/0/1/0/all/0/1">Philip Lu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gelmini_G/0/1/0/all/0/1">Graciela B. Gelmini</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hayashi_K/0/1/0/all/0/1">Kohei Hayashi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Inoue_Y/0/1/0/all/0/1">Yoshiyuki Inoue</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kusenko_A/0/1/0/all/0/1">Alexander Kusenko</a>

Interstellar gas heating is a powerful cosmology-independent observable for
exploring the parameter space of primordial black holes (PBHs) formed in the
early Universe that could constitute part of the dark matter (DM). We provide a
detailed analysis of the various aspects for this observable, such as PBH
emission mechanisms. Using observational data from the Leo T dwarf galaxy, we
constrain the PBH abundance over a broad mass-range, $M_{rm PBH} sim
mathcal{O}(1) M_{odot}-10^7 M_{odot}$, relevant for the recently detected
gravitational wave signals from intermediate-mass BHs. We also consider PBH gas
heating of systems with bulk relative velocity with respect to the DM, such as
Galactic clouds.

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