Constraints on primordial black holes from interstellar dust temperature in the Galaxy
A.N. Melikhov (P.N. Lebedev Physical Institute, Moscow, Russia), E.V. Mikheeva (Astro Space Center of the P.N. Lebedev Physical Institute, Moscow, Russia)
TL;DR
This paper constrains the abundance of primordial black holes by analyzing their potential heating effect on interstellar dust temperature, assuming PBHs follow the dark matter distribution in the Galaxy.
Contribution
It introduces a novel method to limit PBH abundance using interstellar dust temperature measurements, assuming PBHs are distributed like dark matter.
Findings
Constraints on PBH fraction in dark matter derived from dust temperature data
Assumption of homogeneous dust distribution in the Galaxy
PBHs as a heating source for interstellar dust
Abstract
The photons emitted by primordial black holes (PBHs) can be a heating factor for interstellar dust. Assuming that dust in the Galaxy has a homogeneous distribution and that PBHs have the same distribution as dark matter (DM), we constrain the fraction of PBHs in DM from the observational dust temperature in the Galaxy.
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