Black Hole Evaporation in an Expanding Universe

Understand

We calculate the quantum radiation power of black holes which are asymptotic to the Einstein-de Sitter universe at spatial and null infinities.

• We consider two limiting mass accretion scenarios, no accretion and significant accretion.
• We find that the radiation power strongly depends on not only the asymptotic condition but also the mass accretion scenario.
• For the no accretion case, we consider the Einstein-Straus solution, where a black hole of constant mass resides in the dust Friedmann universe.