Radiation flux and spectrum in the Vaidya collapse model

Details Radiation flux and spectrum in the Vaidya collapse model Radiation flux and spectrum in the Vaidya collapse model

2000-02-03

arxiv.org/abs/gr-qc/0002018v1

Phys.Lett. B481 (2000) 74-78

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, Latex File

Scientific paper

10.1016/S0370-2693(00)00416-0

We consider the quantization of a massless scalar field, using the geometric optics approximation, in the background spacetime of a collapsing spherical self-similar Vaidya star, which forms a black hole or a naked singularity. We show that the outgoing radiation flux of the quantized scalar field diverges on the Cauchy horizon. The spectrum of the produced scalar partcles is non-thermal when the background develops a naked singularity. These results are analogous to those obtained for the scalar quantization on a self-similar dust cloud.

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