Uniqueness of the extremal Schwarzschild de Sitter spacetime

Abstract

We prove that any analytic vacuum spacetime with a positive cosmological constant in four and higher dimensions, that contains a static extremal Killing horizon with a maximally symmetric compact cross-section, must be locally isometric to either the extremal Schwarzschild de Sitter solution or its near-horizon geometry (the Nariai solution). In four-dimensions, this implies these solutions are the only analytic vacuum spacetimes that contain a static extremal horizon with compact cross-sections (up to identifications). We also consider the analogous uniqueness problem for the four-dimensional extremal hyperbolic Schwarzschild anti-de Sitter solution and show that it reduces to a spectral problem for the laplacian on compact hyperbolic surfaces, if a cohomological obstruction to the uniqueness of infinitesimal transverse deformations of the horizon is absent.

v2: 19 pages, 1 figure; accepted version. Corrected first order deformations for negative cosmological constant case (now Proposition 2) and added Appendix B, main results unchanged

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Cited by in corpus (5)

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• Transverse expansion of the metric at null hypersurfaces II. Existence results and application to Killing horizons
• Uniqueness of extremal charged black holes in de Sitter
• Static and spherically symmetric vacuum spacetimes with non-expanding principal null directions in $f(R)$ gravity
• Extremal Black Holes from Homotopy Algebras