期刊
PHYSICS LETTERS B
卷 706, 期 1, 页码 13-18出版社
ELSEVIER
DOI: 10.1016/j.physletb.2011.10.059
关键词
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资金
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- JSPS [22740147]
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Research Innovation
- Institute for the Physics and Mathematics of the Universe at The University of Tokyo
- Perimeter Institute
- Grants-in-Aid for Scientific Research [22740147] Funding Source: KAKEN
In 4-dimensional General Relativity, there are several theorems restricting the topology of the event horizon of a black hole. In the stationary case, black holes must have a spherical horizon, while a toroidal spatial topology is allowed only for a short time. In this Letter, we consider spinning black holes inspired by Loop Quantum Gravity and by alternative theories of gravity. We show that the spatial topology of the event horizon of these objects changes when the spin parameter exceeds a critical value and we argue that the phenomenon may be quite common for non-Kerr black holes. Such a possibility may be relevant in astrophysics, as in some models the accretion process can induce the topology transition of the horizon. (C) 2011 Elsevier B.V. All rights reserved.
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