Gravitational collapse of k-essence

Details Gravitational collapse of k-essence Gravitational collapse of k-essence

2011-03-01

arxiv.org/abs/1103.0290v1

JHEP 1104 (2011) 096

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, 8 figures

Scientific paper

10.1007/JHEP04(2011)096

We perform numerical simulations of the gravitational collapse of a k-essence scalar field. When the field is sufficiently strongly gravitating, a black hole forms. However, the black hole has two horizons: a light horizon (the ordinary black hole horizon) and a sound horizon that traps k-essence. In certain cases the k-essence signals can travel faster than light and the sound horizon is inside the light horizon. Under those circumstances, k-essence signals can escape from the black hole. Eventually, the two horizons merge and the k-essence signals can no longer escape.

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