The red-shift effect and radiation decay on black hole spacetimes

Details The red-shift effect and radiation decay on black hole spacetimes The red-shift effect and radiation decay on black hole spacetimes

2005-12-21

arxiv.org/abs/gr-qc/0512119v1

Comm. Pure Appl. Math. 62 (2009), 859-919

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

43 pages, 8 figures

Scientific paper

We consider solutions to the linear wave equation on a (maximally extended) Schwarzschild spacetime, assuming only that the solution decays suitably at spatial infinity on a complete Cauchy hypersurface. (In particular, we allow the support of the solution to contain the bifurcate event horizon.) We prove uniform decay bounds for the solution in the exterior regions, including the uniform bound Cv_+^{-1}, where v_+ denotes max{v,1} and v denotes Eddington-Finkelstein advanced time. We also prove uniform decay bounds for the flux of energy through the event horizon and null infinity. The estimates near the event horizon exploit an integral energy identity normalized to local observers. This estimate can be thought to quantify the celebrated red-shift effect. The results in particular give an independent proof of the classical uniform boundedness theorem of Kay and Wald, without recourse to the discrete isometries of spacetime.

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