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

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

2010-04-06

arxiv.org/abs/1004.0842v1

Class.Quant.Grav.28:015005,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

22 pages,3 figures

Scientific paper

10.1088/0264-9381/28/1/015005

The thermodynamic properties of dark energy-dominated universe in the presence of a black hole are investigated in the general case of a varying equation-of-state-parameter $w(a)$. We show that all the thermodynamics quantities are regular at the phantom divide crossing, and particularly the temperature and the entropy of the dark 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 results we obtain a strictly negative chemical potential and an equation-of-state parameter $w<-5/3.$

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