Constraining primordial black holes as a fraction of dark matter through accretion disk luminosity

Understand

In this paper, we consider the hypothesis that fractions of dark matter could be constituted by primordial black holes (PBHs).

• To test this possibility, we work out the observational properties of a static black hole embedded in the dark matter envelope made of a PBH source.
• The corresponding modifications of geometry due to such a physical system are investigated, with a particular focus on the accretion disk luminosity in spiral galaxies.
• The impact of the PBH presence is analyzed through modification of the disk luminosity and kinematic quantities.