Extremality conditions for isolated and dynamical horizons

Journal Article · Tue Apr 15 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.084005· OSTI ID:21250019

Booth, Ivan; Fairhurst, Stephen ^[1]

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1. Department of Mathematics and Statistics, Memorial University of Newfoundland St. John's, Newfoundland and Labrador, A1C 5S7 (Canada)

A maximally rotating Kerr black hole is said to be extremal. In this paper we introduce the corresponding restrictions for isolated and dynamical horizons. These reduce to the standard notions for Kerr but in general do not require the horizon to be either stationary or rotationally symmetric. We consider physical implications and applications of these results. In particular we introduce a parameter e which characterizes how close a horizon is to extremality and should be calculable in numerical simulations.

• OSTI ID: 21250019
• Journal Information: Physical Review. D, Particles Fields, Vol. 77, Issue 8; Other Information: DOI: 10.1103/PhysRevD.77.084005; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
BLACK HOLES
KERR FIELD
ROTATION
SIMULATION
SYMMETRY