Hawking radiation and thermodynamics of dynamical black holes in a phantom-dominated universe

Author: Nouicer Khireddine  

Publisher: IOP Publishing

ISSN: 0264-9381

Source: Classical and Quantum Gravity, Vol.28, Iss.1, 2011-01, pp. : 15005-15023

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Abstract

We investigate the thermodynamic properties of a phantom-energy-dominated universe in the presence of a black hole in the general case of a varying equation-of-state parameter w(a). We show that all the thermodynamic quantities are regular at the phantom divide crossing, and particularly the temperature and the entropy of a phantom fluid are always positive definite. We also study the accretion process of a phantom fluid by black holes and the conditions required for the validity of the generalized second law of thermodynamics. As a result, we obtain a strictly negative chemical potential and an equation-of-state parameter w < −5/3.