Photon surfaces with equipotential time slices
Photon surfaces with equipotential time slices
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DOI:
10.1063/5.0031280
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发表时间:
2019-10
影响因子:
1.3
通讯作者:
Carla Cederbaum;G. Galloway
中科院分区:
文献类型:
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作者:
Carla Cederbaum;G. Galloway
Photon surfaces are timelike, totally umbilic hypersurfaces of Lorentzian spacetimes. In the first part of this paper, we locally characterize all possible photon surfaces in a class of static, spherically symmetric spacetimes that includes Schwarzschild, Reissner--Nordstr\"om, Schwarzschild-anti de Sitter, etc., in $n+1$ dimensions. In the second part, we prove that any static, vacuum, "asymptotically isotropic" $n+1$-dimensional spacetime that possesses what we call an "equipotential" and "outward directed" photon surface is isometric to the Schwarzschild spacetime of the same (necessarily positive) mass, using a uniqueness result by the first named author.