A note on instabilities of extremal black holes under scalar perturbations from afar
arXiv:1212.1103 · doi:10.1088/0264-9381/30/9/095010
Abstract
In previous work of the author it was shown that instabilities of solutions to the wave equation develop asymptotically along the event horizon of extremal Kerr provided a certain expression H of the initial data is non-trivial on the horizon. In this note we remove this restriction by showing that instabilities develop even from initial data supported arbitrarily far away from the horizon (for which, in particular, H=0). The latter instabilities concern one order higher derivatives compared to the case where H is non-zero. The result also applies to extremal Reissner-Nordstrom. This note was motivated by numerical analysis of Lucietti, Murata, Reall and Tanahashi.
14 pages, 8 figures
References in corpus (3)
Cited by in corpus (41)
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