Dynamical surface gravity

Details Dynamical surface gravity Dynamical surface gravity

2007-11-09

arxiv.org/abs/0711.1445v1

Class.Quant.Grav.25:085010,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages, no figures

Scientific paper

10.1088/0264-9381/25/8/085010

We discuss how the surface gravity can be classically defined for dynamical black holes. In particular we focus on defining the surface gravity for locally defined horizons and compare a number definitions proposed in the literature. We illustrate the differences between the various proposals in the case of an arbitrary dynamical, spherically symmetric black hole spacetime. We also discuss how the trapping horizon formalism of Hayward can be related to other constructions.

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