Speaker
Edward Wilson-Ewing (Zoom)
(University of New Brunswick)
Description
Effective models of gravitational collapse in loop quantum gravity for the Lemaître-Tolman-Bondi spacetime predict that collapsing matter reaches a maximum finite density, bounces, and then expands outward. I will explain that in the marginally bound case, shell-crossing singularities commonly occur for inhomogeneous initial profiles of the dust energy density; this is the case in particular for all profiles that are continuous and of compact support, including configurations arbitrarily close to the Oppenheimer-Snyder model. When a shell-crossing singularity occurs, it is necessary to seek weak solutions to the dynamics; these typically contain shock waves.
Primary author
Edward Wilson-Ewing (Zoom)
(University of New Brunswick)
