There are many logically and computationally distinct characterizations of the surface gravity of a horizon, just as there are many logically rather distinct notions of horizon. Fortunately, in standard general relativity, for stationary horizons, these characterizations are degenerate. However, in modified gravity, or in analogue spacetimes, horizons may be non-Killing or even non-null, and hence these degeneracies can be lifted. We present a brief overview of the key issues, specifically focusing on horizons in analogue spacetimes and universal horizons in modified gravity.

Surface gravities for non-Killing horizons / Cropp, B; Liberati, Stefano; Visser, M.. - In: CLASSICAL AND QUANTUM GRAVITY. - ISSN 0264-9381. - 30:12(2013), pp. 125001.1-125001.22. [10.1088/0264-9381/30/12/125001]

Surface gravities for non-Killing horizons

Liberati, Stefano;
2013-01-01

Abstract

There are many logically and computationally distinct characterizations of the surface gravity of a horizon, just as there are many logically rather distinct notions of horizon. Fortunately, in standard general relativity, for stationary horizons, these characterizations are degenerate. However, in modified gravity, or in analogue spacetimes, horizons may be non-Killing or even non-null, and hence these degeneracies can be lifted. We present a brief overview of the key issues, specifically focusing on horizons in analogue spacetimes and universal horizons in modified gravity.
2013
30
12
1
22
125001
https://arxiv.org/abs/1302.2383
Cropp, B; Liberati, Stefano; Visser, M.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/11525
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