Instability of Ultra-Spinning Black Holes

Details Instability of Ultra-Spinning Black Holes Instability of Ultra-Spinning Black Holes

2003-08-07

arxiv.org/abs/hep-th/0308056v2

JHEP 0309:025,2003

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, typo's corrected, ref's added

Scientific paper

10.1088/1126-6708/2003/09/025

It has long been known that, in higher-dimensional general relativity, there are black hole solutions with an arbitrarily large angular momentum for a fixed mass. We examine the geometry of the event horizon of such ultra-spinning black holes and argue that these solutions become unstable at large enough rotation. Hence we find that higher-dimensional general relativity imposes an effective `Kerr-bound' on spinning black holes through a dynamical decay mechanism. Our results also give indications of the existence of new stationary black holes with `rippled' horizons of spherical topology. We consider various scenarios for the possible decay of ultra-spinning black holes, and finally discuss the implications of our results for black holes in braneworld scenarios.

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