Dark matter density spikes around primordial black holes

  title={Dark matter density spikes around primordial black holes},
  author={Yu. N. Eroshenko},
  journal={Astronomy Letters},
We show that density spikes begin to form from dark matter particles around primordial black holes immediately after their formation at the radiation-dominated cosmological stage. This stems from the fact that in the thermal velocity distribution of particles there are particles with low velocities that remain in finite orbits around black holes and are not involved in the cosmological expansion. The accumulation of such particles near black holes gives rise to density spikes. These spikes are… 
Dark matter around primordial black hole at the radiation-dominated stage
  • Y. Eroshenko
  • Physics
    International Journal of Modern Physics A
  • 2020
The accumulation of dark matter particles near the primordial black holes starts at the radiation-dominated cosmological stage and produces the central density spikes. The spikes can be the bright
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