On the boundary of the region containing trapped surfaces

Details On the boundary of the region containing trapped surfaces On the boundary of the region containing trapped surfaces

2008-12-15

arxiv.org/abs/0812.2767v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

16 pages, 1 Table, 3 Figures. Invited talk to appear in the proceedings of the Spanish Relativity Meeting ERE-08, Salamanca, "

Scientific paper

The boundary of the region in spacetime containing future-trapped closed surfaces is considered. In asymptotically flat spacetimes, this boundary does not need to be the event horizon nor a dynamical/trapping horizon. Some properties of this boundary and its localization are analyzed, and illustrated with examples. In particular, fully explicit future-trapped compact surfaces penetrating into flat portions of a Vaidya spacetime are presented.

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