A Note on trapped Surfaces in the Vaidya Solution

Details A Note on trapped Surfaces in the Vaidya Solution A Note on trapped Surfaces in the Vaidya Solution

2008-09-12

arxiv.org/abs/0809.2213v2

Phys.Rev.D79:024027,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, 4 figures; minor polish added to version 2

Scientific paper

10.1103/PhysRevD.79.024027

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.

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