Trapped surfaces and the Penrose inequality in spherically symmetric geometries

Details Trapped surfaces and the Penrose inequality in spherically symmetric geometries Trapped surfaces and the Penrose inequality in spherically symmetric geometries

1994-01-17

arxiv.org/abs/gr-qc/9401014v1

Phys.Rev. D49 (1994) 6931-6934

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

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Scientific paper

10.1103/PhysRevD.49.6931

We demonstrate that the Penrose inequality is valid for spherically symmetric geometries even when the horizon is immersed in matter. The matter field need not be at rest. The only restriction is that the source satisfies the weak energy condition outside the horizon. No restrictions are placed on the matter inside the horizon. The proof of the Penrose inequality gives a new necessary condition for the formation of trapped surfaces. This formulation can also be adapted to give a sufficient condition. We show that a modification of the Penrose inequality proposed by Gibbons for charged black holes can be broken in early stages of gravitational collapse. This investigation is based exclusively on the initial data formulation of General Relativity.

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