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6 papers · 1 filter
Comment on ``Strength and genericity of singularities in Tolman-Bondi-de Sitter collapse'' and a note on central singularities
Brien C. Nolan, Filipe C. Mena, Sergio M. C. V. Goncalves
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, regard…
The 1-soliton in the SO(3) gauged Skyrme model with mass term
Y. Brihaye, J. Burzlaff, V. Paturyan +1
The solitons of the SO(3) gauged Skyrme model with no pion-mass potential were studied in Refs. {nl,jmp}. Here, the effects of the inclusion of this potential are studied. In contr…
Non-radial null geodesics in spherical dust collapse
Filipe C Mena, Brien C Nolan
The issue of the local visibility of the shell-focussing singularity in marginally bound spherical dust collapse is considered from the point of view of the existence of future-dir…
Bouncing Branes
Emil M. Prodanov
Two classical scalar fields are minimally coupled to gravity in the Kachru-Shulz-Silverstein scenario with a rolling fifth radius. A Tolman wormhole solution is found for a R x S^3…
Relativistic Blastwaves and Synchrotron Emission
T. P. Downes, P. Duffy, S. Komissarov
Relativistic shocks accelerate particles by the first order Fermi mechanism. These particles then emit synchrotron emission in the post shock gas. We have developed a numerical cod…
A note on behaviour at an isotropic singularity
Brien C. Nolan
The behaviour of Jacobi fields along a time-like geodesic running into an isotropic singularity is studied. It is shown that the Jacobi fields are crushed to zero length at a rate…