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Cosmic censorship violation in black hole collisions in higher dimensions

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We argue that cosmic censorship is violated in the collision of two black holes in high spacetime dimension D when the initial total angular momentum is sufficiently large. The two black holes merge and form an unstable bar-like horizon, which grows a neck in its middle that pinches down with diverging curvature. When D is large, the emission of gravitational radiation is strongly suppressed and cannot spin down the system to a stable rotating black hole before the neck grows. The phenomenon is demonstrated using simple numerical simulations of the effective theory in the 1/D expansion. We propose that, even though cosmic censorship is violated, the loss of predictability is small independently of D.

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Journal of High Energy Physics, 2019, vol. 04, p. 121

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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Cosmic censorship violation in black hole collisions in higher dimensions