Accretion of Ghost Condensate by Black Holes

Details Accretion of Ghost Condensate by Black Holes Accretion of Ghost Condensate by Black Holes

2004-04-28

arxiv.org/abs/hep-th/0404216v2

Phys.Rev. D70 (2004) 061501

Physics

High Energy Physics

High Energy Physics - Theory

5 pages, 3 figures, REVTeX 4.0; discussion expanded

Scientific paper

10.1103/PhysRevD.70.061501

The intent of this letter is to point out that the accretion of a ghost condensate by black holes could be extremely efficient. We analyze steady-state spherically symmetric flows of the ghost fluid in the gravitational field of a Schwarzschild black hole and calculate the accretion rate. Unlike minimally coupled scalar field or quintessence, the accretion rate is set not by the cosmological energy density of the field, but by the energy scale of the ghost condensate theory. If hydrodynamical flow is established, it could be as high as tenth of a solar mass per second for 10MeV-scale ghost condensate accreting onto a stellar-sized black hole, which puts serious constraints on the parameters of the ghost condensate model.

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