Journal
JOURNAL OF FUNCTIONAL ANALYSIS
Volume 263, Issue 9, Pages 2770-2831Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jfa.2012.08.015
Keywords
Wave equation; Kerr black holes; Stability of black holes; Extremal black holes
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Funding
- Bodossaki Grant
- European Research Council
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We study the Cauchy problem for the wave equation square(g) psi = 0 on extreme Kerr backgrounds. Specifically, we consider regular axisymmetric initial data prescribed on a Cauchy hypersurface Sigma(0) which connects the future event horizon with spacelike or null infinity, and we solve the linear wave equation on the domain of dependence of Sigma(0). We show that the spacetime integral of an energy-type density is bounded by the initial conserved flux corresponding to the stationary Killing field T, and we derive boundedness of the non-degenerate energy flux corresponding to a globally timelike vector field N. Finally, we prove uniform pointwise boundedness and power-law decay for psi up to and including the event horizon H+. Published by Elsevier Inc.
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