Evolution of Primordial Black Holes in a radiation and phantom energy environment

Details Evolution of Primordial Black Holes in a radiation and phantom energy environment Evolution of Primordial Black Holes in a radiation and phantom energy environment

2007-11-22

arxiv.org/abs/0711.3641v1

Gen.Rel.Grav.40:1593-1602,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pp, 2 figs., to appear in GRG

Scientific paper

10.1007/s10714-007-0562-8

In this work we extend previous work on the evolution of a Primordial Black Hole (PBH) to address the presence of a dark energy component with a super-negative equation of state as a background, investigating the competition between the radiation accretion, the Hawking evaporation and the phantom accretion, the latter two causing a decrease on black hole mass. It is found that there is an instant during the matter-dominated era after which the radiation accretion becomes negligible compared to the phantom accretion. The Hawking evaporation may become important again depending on a mass threshold. The evaporation of PBHs is quite modified at late times by these effects, but only if the Generalized Second Law of thermodynamics is violated.

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