Cosmological evolution of primordial black holes

Understand

The cosmological evolution of primordial black holes (PBHs) is considered.

• A comprehensive view of the accretion and evaporation histories of PBHs across the entire cosmic history is presented, with focus on the critical mass holes.
• The critical mass of a PBH for current era evaporation is $M_{cr}\sim 5.1\times10^{14}$ g.
• Across cosmic time such a black hole will not accrete radiation or matter in sufficient quantity to hasten the inevitable evaporation, if the black hole remains within an average volume of the universe.