arXiv subjects

Patricio S. Letelier

Publications and source records attributed to Patricio S. Letelier.

57 records · Page 4Linked to original sources

arXiv1995

Domain Wall Spacetimes: Instability of Cosmological Event and Cauchy Horizons

The stability of cosmological event and Cauchy horizons of spacetimes associated with plane symmetric domain walls are studied. It is found that both horizons are not stable against perturbations of null fluids and massless scalar fields; they are turned into curvature singularities. These singularities are light-like and strong in the sense that both the tidal forces and distortions acting on test particles become unbounded when theses singularities are approached.

gr-qc↗

arXiv1995

Inflating Defects

A Kantowski-Sachs cosmological model with an O(3) global defect as a source is studied in the context of the topological inflation scenario.

gr-qc↗

arXiv1994

Local and global structure of a thick domain wall space-time

The local and global properties of the Goetz thick plane domain wall space-time are studied. It is found that when the surface energy of the wall is greater than a critical value $σ_{c}$, the space-time will be closed by intermediate singularities at a finite proper distance. A model is presented in which these singularities will give rise to scalar ones when interacting with null fluids. The maximum extension of the space-time of the wall whose surface energy is less than $σ_{c}$ is presented. It is shown that for certain choice of the free parameter the space-time has a black hole structure but with plane symmetry.

gr-qc↗