On the Hawking radiation associated with an Oppenheimer-Snyder collapsing star.

Details On the Hawking radiation associated with an Oppenheimer-Snyder collapsing star. On the Hawking radiation associated with an Oppenheimer-Snyder collapsing star.

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hraw.book.....s&link_type=abstract

On the Hawking radiation associated with an Oppenheimer-Snyder collapsing star., by Salehi, H.. Deutsches Elektronen-Synchrotron

Physics

Optics

Scientific paper

The author discusses on the basis of the geometrical optics approximation the development of the Hawking-radiation in the space-time of a black hole resulting from an Oppenheimer-Snyder collapsing star. To the extent that one can use this approximation it is shown that the asymptotic flow of radiation to future null infinity does not depend on the specific parameter describing the initial condition for the stellar collapse (in the model the initial radius). Further a unique definition of the radial part of the radiation is given via the concept of normal ordering of the energy momentum tensor operator with respect to the time-like Killing vectorfield of the Schwarzschild-metric. The remaining ambiguity is related to the global features of states.

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