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Destroying extremal Kerr-Newman black holes with test particles

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arxiv 1211.2631 v2 pith:N5IORVP2 submitted 2012-11-12 gr-qc

classification gr-qc
keywords blackextremalholecensorshipcosmicparticletestviolation
verification ladder T0 review T1 audit T2 compute T3 formal
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It has been shown that a nearly extremal black hole can be overcharged or overspun by a test particle if radiative and self-force effects are neglected, indicating that the cosmic censorship might fail. In contrast, the existing evidence in literature suggests that an extremal black hole cannot be overcharged or overspun in a similar process. In this paper, we show explicitly that even an exactly extremal black hole can be destroyed by a test particle, leading to a possible violation of the cosmic censorship. By considering higher order terms, which were neglected in previous analysis, we show that the violation is generic for any extremal Kerr-Newman black hole with nonvanishing charge and angular momentum. We also find that the allowed parameter range for the particle is very narrow, indicating that radiative and self-force effects should be considered and may prevent violation of the cosmic censorship.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Trapped Surface as a Cosmic Censor

    gr-qc 2026-06 unverdicted novelty 7.0 of 10

    A trapped-surface criterion, derived under null convergence and generic conditions, rules out superextremal Reissner-Nordström, Kerr-Newman, and related final states in overcharging thought experiments without using a...

  2. Violating Weak Cosmic Censorship in AdS$_3$ via Gedanken Experiment

    hep-th 2025-08 unverdicted novelty 5.0 of 10

    Under the test-particle approximation, an extremal quantum-corrected BTZ black hole can have its horizon destroyed by a particle with large angular momentum, giving a potential counterexample to weak cosmic censorship.

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