Instability of black hole formation in gravitational collapse

Pankaj S. Joshi, Daniele Malafarina

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We consider here the classic scenario given by Oppenheimer, Snyder, and Datt, for the gravitational collapse of a massive matter cloud, and examine its stability under the introduction of small tangential stresses. We show, by offering an explicit class of physically valid tangential stress perturbations, that an introduction of tangential pressure, however small, can qualitatively change the final fate of collapse from a black hole final state to a naked singularity. This shows instability of black hole formation in collapse and sheds important light on the nature of cosmic censorship hypothesis and its possible formulations. The key effect of these perturbations is to alter the trapped surface formation pattern within the collapsing cloud and the apparent horizon structure. This allows the singularity to be visible, and implications are discussed.

Original languageEnglish
Article number024009
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume83
Issue number2
DOIs
Publication statusPublished - Jan 10 2011
Externally publishedYes

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gravitational collapse
naked singularities
perturbation
horizon
formulations

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Instability of black hole formation in gravitational collapse. / Joshi, Pankaj S.; Malafarina, Daniele.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 83, No. 2, 024009, 10.01.2011.

Research output: Contribution to journalArticle

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