Does the mass of a black hole decrease due to the accretion of phantom energy

Details Does the mass of a black hole decrease due to the accretion of phantom energy Does the mass of a black hole decrease due to the accretion of phantom energy

2008-02-10

arxiv.org/abs/0802.1298v2

Phys.Rev.D78:024008,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, 5 figures. PRD accepted

Scientific paper

10.1103/PhysRevD.78.024008

According to Babichev et al., the accretion of a phantom test fluid onto a Schwarzschild black hole will induce the mass of the black hole to decrease, however the backreaction was ignored in their calculation. Using new exact solutions describing black holes in a background Friedmann-Robertson-Walker universe, we find that the physical black hole mass may instead increase due to the accretion of phantom energy. If this is the case, and the future universe is dominated by phantom dark energy, the black hole apparent horizon and the cosmic apparent horizon will eventually coincide and, after that, the black hole singularity will become naked in finite comoving time before the Big Rip occurs, violating the Cosmic Censorship Conjecture.

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