How extreme are extreme black holes?

David Garfinkle

How extreme are extreme black holes?

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arxiv 1105.2574 v1 pith:CGX7SOGZ submitted 2011-05-12 gr-qc hep-th

David Garfinkle This is my paper

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keywords blackextremeholescollapsecrossesencountersexamineextremal

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We examine the properties of nearly extremal black holes produced by gravitational collapse. It is shown that an observer who crosses the black hole horizon at late times rapidly encounters a singularity.

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A Nonlinear Endpoint of Charged Horizon Instabilities
gr-qc 2026-02 conditional novelty 7.0 of 10

Charged scalar collapse can form dynamical extremal black holes whose horizons show divergent energy density and constant charge hair, with universal near-threshold scaling.

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