Late-time particle creation from gravitational collapse to an extremal Reissner-Nordstrom black hole

Details Late-time particle creation from gravitational collapse to an extremal Reissner-Nordstrom black hole Late-time particle creation from gravitational collapse to an extremal Reissner-Nordstrom black hole

2002-07-04

arxiv.org/abs/gr-qc/0207029v2

Phys.Rev. D68 (2003) 044028

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

revised version, 25 pages, 2 figures

Scientific paper

10.1103/PhysRevD.68.044028

We investigate the late time behavior of particle creation from an extremal Reissner-Nordstrom (RN) black hole formed by gravitational collapse. We calculate explicitly the particle flux associated with a massless scalar field at late times after the collapse. Our result shows that the expected number of particles in any wave packet spontaneously created from the ``in'' vacuum state approaches zero faster than any inverse power of time. This result confirms the traditional belief that extremal black holes do not emit particles. We also calculate the expectation value of the stress energy tensor in a 1+1 RN black hole and show that it also drops to zero at late times. Some comments on previous work by other authors are provided.

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