Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2009-07-26
Phys.Rev.D80:044013,2009
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
7 pages, revtex, 1 figure, to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.80.044013
The Sultana-Dyer solution of general relativity representing a black hole embedded in a special cosmological background is analysed. We find an expanding (weak) spacetime singularity instead of the reported conformal Killing horizon, which is covered by an expanding black hole apparent horizon (internal to a cosmological apparent horizon) for most of the history of the universe. This singularity was naked early on. The global structure of the solution is studied as well.
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