Dark matter around primordial black hole at the radiation-dominated stage

Understand

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 gamma-ray sources due to dark matter annihilation.
• We present the self-consistent derivation of the equation of motion of particle in the metrics of primordial black hole immersed into cosmological background.
• By numerical solution of this equation we find the central dark matter density profile.