Evolution of Primordial Black Holes in a radiation and phantom energy environment
Abstract
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.
Keywords
Cite
@article{arxiv.0711.3641,
title = {Evolution of Primordial Black Holes in a radiation and phantom energy environment},
author = {Daniel C. Guariento and J. E. Horvath and P. S. Custódio and J. A. de Freitas Pacheco},
journal= {arXiv preprint arXiv:0711.3641},
year = {2008}
}
Comments
6 pp, 2 figs., to appear in GRG