Abstract

MARTINEZ, Héctor  and  PERALTA, Carlos. Self-similarity in a Kantowski-Sachs universe with a string cloud. Rev. mex. fis. [online]. 2005, vol.51, n.1, pp.22-26. ISSN 0035-001X.

We study a cosmological model with very simple solutions characterized by string clouds. Assuming self-similar symmetry for a Kantowski-Sachs spacetime we study the gravitational effects of the cosmic strings. It is also assumed that the primitive universe enters in a false vacuum-dominated era, accelerating the expansion in a time period of the order of 10^-35 sec (a phase transition), satisfying all the energy conditions. Finally, we examine the possibility that in the last stages of this evolution, the geometry of the universe could be flat.

Keywords : Self-similar; strings; inflation; universe.