Constraining Primordial Black Hole Fraction at the Galactic Centre using
  radio observational data
  Recent gamma-ray and cosmic-ray observations have put strong constraints on
the amount of primordial black holes (PBHs) in our universe. In this article,
we use the archival radio data of the inner Galactic Centre to constrain the
PBH to dark matter ratio for three different PBH mass distributions including
monochromatic, log-normal and power-law. We show that the amount of PBHs only
constitutes a very minor component of dark matter at the Galactic Centre for a
large parameter space.
