Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-12-31
Phys.Lett.B673:156-160,2009
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
11 pages, 5 figures, revised version, accepted for publication in Phys.Lett.B
Scientific paper
10.1016/j.physletb.2009.02.002
We study perturbations of black holes absorbing dark energy. Due to the accretion of dark energy, the black hole mass changes. We observe distinct perturbation behaviors for absorption of different forms of dark energy into the black holes. This provides the possibility of extracting information whether dark energy lies above or below the cosmological constant boundary $w=-1$. In particular, we find in the late time tail analysis that, differently from the other dark energy models, the accretion of phantom energy exhibits a growing mode in the perturbation tail. The instability behavior found in this work is consistent with the Big Rip scenario, in which all of the bound objects are torn apart with the presence of the phantom dark energy.
He Xi
Lin Chi-Yong
Wang Bin
Wu Shao-Feng
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