Global embedding of the Kerr black hole event horizon into hyperbolic 3-space

Abstract

An explicit global and unique isometric embedding into hyperbolic 3-space, H^3, of an axi-symmetric 2-surface with Gaussian curvature bounded below is given. In particular, this allows the embedding into H^3 of surfaces of revolution having negative, but finite, Gaussian curvature at smooth fixed points of the U(1) isometry. As an example, we exhibit the global embedding of the Kerr-Newman event horizon into H^3, for arbitrary values of the angular momentum. For this example, considering a quotient of H^3 by the Picard group, we show that the hyperbolic embedding fits in a fundamental domain of the group up to a slightly larger value of the angular momentum than the limit for which a global embedding into Euclidean 3-space is possible. An embedding of the double-Kerr event horizon is also presented, as an example of an embedding which cannot be made global.

16 pages, 13 figures

References in corpus (6)

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• Stationary Metrics and Optical Zermelo-Randers-Finsler Geometry
• On the interaction between two Kerr black holes
• Dynamical and Thermodynamical Aspects of Interacting Kerr Black Holes
• Birkhoff's invariant and Thorne's Hoop Conjecture
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