A new result on the Klein-Gordon equation in the background of a rotating black 
hole

Beyer, Horst R.

doi:10.1063/1.3037327

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A new result on the Klein-Gordon equation in the background of a rotating black hole

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Beyer, Horst R.
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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0802.3824v1.pdf
(Preprint), 143KB

JMP1.3037327.pdf
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Citation

Beyer, H. R. (2009). A new result on the Klein-Gordon equation in the background of a rotating black hole. Journal of Mathematical Physics, 50: 012502. doi:10.1063/1.3037327.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-627D-7

Abstract

This short paper should serve as basis for further analysis of a previously found new symmetry of the solutions of the wave equation in the gravitational
field of a Kerr black hole. Its main new result is the proof of essential self-adjointness of the spatial part of a reduced normalized wave operator of
the Kerr metric in a weighted L^2-space. As a consequence, it leads to a purely operator theoretic proof of the well-posedness of the initial value problem of the reduced Klein-Gordon equation in that field in that L^2-space and in this way generalizes a corresponding result of Kay (1985) in the case of the
Schwarzschild black hole. It is believed that the employed methods are applicable to other separable wave equations.