Toroidal horizons in binary black hole mergers
Autor: | Andy Bohn, Lawrence E. Kidder, Saul A. Teukolsky |
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Jazyk: | angličtina |
Rok vydání: | 2016 |
Předmět: |
Physics
010308 nuclear & particles physics Event horizon Membrane paradigm White hole Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Fuzzball 01 natural sciences General Relativity and Quantum Cosmology Black hole Theoretical physics Classical mechanics Binary black hole Nonsingular black hole models 0103 physical sciences Extremal black hole 010306 general physics |
Popis: | We find the first binary black hole event horizon with a toroidal topology. It had been predicted that generically the event horizons of merging black holes should briefly have a toroidal topology, but such a phase has never been seen prior to this work. In all previous binary black hole simulations, in the coordinate slicing used to evolve the black holes, the topology of the event horizon transitions directly from two spheres during the inspiral to a single sphere as the black holes merge. We present a coordinate transformation to a foliation of spacelike hypersurfaces that "cut a hole" through the event horizon surface, resulting in a toroidal event horizon. A torus could potentially provide a mechanism for violating topological censorship. However, these toroidal event horizons satisfy topological censorship by construction, because we can always trivially apply the inverse coordinate transformation to remove the topological feature. Comment: 13 pages, 18 figures, supplementary videos at https://www.black-holes.org/for-researchers/event-horizon-topologies |
Databáze: | OpenAIRE |
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