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Phys. Rev. D 79, 024027 (2009) [6 pages]

Note on trapped surfaces in the Vaidya solution

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Ingemar Bengtsson*
Stockholms Universitet, Fysikum AlbaNova, S-106 91 Stockholm, Sweden

José M. M. Senovilla
Física Teórica, Universidad del País Vasco, Apartado 644, 48080 Bilbao, Spain

Received 6 October 2008; published 28 January 2009

The Vaidya solution describes the gravitational collapse of a finite shell of incoherent radiation falling into flat spacetime and giving rise to a Schwarzschild black hole. There has been a question whether closed trapped surfaces can extend into the flat region (whereas closed outer trapped surfaces certainly can). For the special case of self-similar collapse we show that the answer is yes, if and only if the mass function rises fast enough.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.79.024027
DOI:
10.1103/PhysRevD.79.024027
PACS:
04.70.Bw

*ingemar@physto.se

josemm.senovilla@ehu.es

See Also

See Also: Ingemar Bengtsson and José M. M. Senovilla, Region with trapped surfaces in spherical symmetry, its core, and their boundaries, Phys. Rev. D 83, 044012 (2011).