Strong curvature singularities in quasi-spherical asymptotically de Sitter dust collapse

Strong curvature singularities in quasispherical asymptotically de Sitter dust collapse

We study the occurrence, visibility, and curvature strength of singularities in dust-containing Szekeres spacetimes (which possess no Killing vectors) with a positive cosmological constant. We find that such singularities can be locally naked, Tipler strong, and develop from a non-zero-measure set of regular initial data. When examined along timelike geodesics, the singularity’s curvature stren...

Naked singularities in Tolman–Bondi–de Sitter collapse

We study the formation of central naked singularities in spherical dust collapse with a cosmological constant. We find that the central curvature singularity is locally naked, Tipler strong, and generic, in the sense that it forms from a non-zero-measure set of regular initial data. We also find that the Weyl and Ricci curvature scalars diverge at the singularity, with the former dominating ove...

Asymptotically de Sitter Spaces

We propose a novel prescription for computing the boundary stress tensor and charges of asymptotically de Sitter (dS) spacetimes from data at early or late time infinity. If there is a holographic dual to dS spaces, defined analogously to the AdS/CFT correspondence, our methods compute the (Euclidean) stress tensor of the dual. We compute the masses of Schwarzschild-de Sitter black holes in fou...

Asymptotically anti-de Sitter wormholes.

Carlos Barceló, 1 Luis J. Garay, 2 Pedro F. González-Dı́az, 3 and Guillermo A. Mena Marugán 3 Instituto de Astrofı́sica de Andalucı́a, CSIC, Camino Bajo de Huétor, 18080 Granada, Spain Theoretical Physics Group, The Blackett Laboratory, Imperial College, London SW7 2BZ, United Kingdom Centro de Fı́sica ‘‘Miguel A. Catalán,’’ Instituto de Matemáticas y Fı́sica Fundamental, CSIC, Serrano 121, 28006 Ma...

Spherical and Non-spherical Gravitational Collapse in Monopole-anti-de Sitter-vaidya Spacetime