Comment on ``Strength and genericity of singularities in Tolman-Bondi-de Sitter collapse'' and a note on central singularities

Abstract

It has been claimed that the Lemaitre-Tolman-Bondi-de Sitter solution always admits future-pointing radial time-like geodesics emerging from the shell-focussing singularity, regardless of the nature of the (regular) initial data. This is despite the fact that some data rule out the emergence of future pointing radial null geodesics. We correct this claim and show that in general in spherical symmetry, the absence of radial null geodesics emerging from a central singularity is sufficient to prove that the singularity is censored.

3 pages, revtex4, submitted to Phys. Lett. A

References in corpus (3)

• Non-radial null geodesics in spherical dust collapse
• Naked singularities in Tolman-Bondi-de Sitter collapse
• Strength and genericity of singularities in Tolman-Bondi-de Sitter collapse

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• The role of anisotropy and inhomogeneity in Lemaitre-Tolman-Bondi collapse
• Geometry and topology of singularities in spherical dust collapse
• Null Fluid collapse in Rastall theory of gravity
• Exact black-hole formation with a conformally coupled scalar field in three dimensions