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Global visibility of a strong curvature singularity in nonmarginally bound dust collapse

We investigate here the local versus global visibility of a spacetime singularity formed due to the gravitational collapse of a spherically symmetric dust cloud having a nonzero velocity function. The conditions are investigated that ensure the global visibility of the singularity, in the sense that...

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Bibliographic Details
Published in:Physical review. D 2020-08, Vol.102 (4), p.1, Article 044037
Main Authors: Mosani, Karim, Dey, Dipanjan, Joshi, Pankaj S.
Format: Article
Language:English
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Summary:We investigate here the local versus global visibility of a spacetime singularity formed due to the gravitational collapse of a spherically symmetric dust cloud having a nonzero velocity function. The conditions are investigated that ensure the global visibility of the singularity, in the sense that the outgoing null geodesics leave the boundary of the matter cloud in the future, whereas, in the past, these terminate at the singularity. Explicit examples of this effect are constructed. We require that this must be a strong curvature singularity in the sense of Tipler, to ensure the physical significance of the scenario considered. This may act as a counterexample to the weak cosmic censorship hypothesis.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.102.044037