BH4 - Gravitational fields with sources: From compact objects to black holes |
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Speaker |
Cropp, Bethan |
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Coauthors |
Cropp, Bethan; Liberati, Stefano; Mohd, Arif; Visser, Matt |
| Talk Title |
Understanding Universal Horizons |
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Abstract |
Violating Lorentz-invariance, and so permitting some form of superluminal communication, necessarily alters the notion of a black hole. Nevertheless,in both Einstein-Aether gravity, and Horava-Lifshitz gravity, there is a causally disconnected region in black-hole solutions; now bounded by a “Universal horizon", which traps excitations of arbitrarily high velocities. This talk will discuss aspects of physics of spacetimes containing these horizons, especially focusing on the surface gravity of Universal horizons and studying trajectories in these spacetimes. |
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