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Black hole boundaries

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arxiv gr-qc/0508107 v2 pith:MQETRPOD submitted 2005-08-26 gr-qc

Ivan Booth This is my paper · ORCID
classification gr-qc
keywords blackholeshorizonsalternativenullapparentassociatedboundaries
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Classical black holes and event horizons are highly non-local objects, defined in relation to the causal past of future null infinity. Alternative, quasilocal characterizations of black holes are often used in mathematical, quantum, and numerical relativity. These include apparent, killing, trapping, isolated, dynamical, and slowly evolving horizons. All of these are closely associated with two-surfaces of zero outward null expansion. This paper reviews the traditional definition of black holes and provides an overview of some of the more recent work on alternative horizons.

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Forward citations

Cited by 8 Pith papers

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

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  3. Cusp Formation in Merging Black Hole Horizons

    gr-qc 2026-05 unverdicted novelty 6.0 of 10

    Numerical study of cusp formation on horizons in head-on non-spinning black hole mergers, with analysis of mass and multipole behavior at the cusp and a proposed phenomenological model.

  4. Thermodynamics of Black Holes, far from Equilibrium

    gr-qc 2025-12 conditional novelty 6.0 of 10

    The paper derives finite, physical-process versions of the first and second laws of black hole thermodynamics for dynamical horizon segments, extending the first law to black holes arbitrarily far from equilibrium.

  5. Dynamical Entropy Is a Noether Charge

    hep-th 2026-07 reject novelty 5.0 of 10

    A Noether-charge derivation of the known HWZ dynamical entropy for generic null surfaces, whose local second-law proof is invalid as printed because Eq. (19) has the wrong sign in K.

  6. Interior marginally outer trapped surfaces in Hayward black holes

    gr-qc 2026-06 unverdicted novelty 5.0 of 10

    Interior MOTS in Hayward black holes are located via the b-parameter metric, with self-intersecting pairs identified and positions near the inner horizon given by hypergeometric functions from a singular Sturm-Liouvil...

  7. Dynamical black holes and accretion-induced backreaction

    gr-qc 2025-07 conditional novelty 4.0 of 10

    For accreting Reissner-Nordstrom black holes, the momentum flux from infalling matter splits an extremal horizon into two, while energy density displaces the extremal horizon's radius.

  8. Primordial Black Holes: A Review of Formation and Evolution

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    Review of PBH formation via compaction function and relativistic thresholds in FLRW backgrounds, arguing that memory burden and curvature corrections halt evaporation to leave Planck-scale relics.

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