Massive cosmic strings in Bianchi type II

Abstract

We study a massive cosmic strings with BII symmetries cosmological models in two contexts. The first of them is the standard one with a barotropic equation of state. In the second one we explore the possibility of taking into account variable \textquotedblleft constants\textquotedblright ($G$ and $\Lambda ).$Both models are studied under the self-similar hypothesis. We put special emphasis in calculating the numerical values for the equations of state. We find that for $\omega \in (0,1]$, $G$, is a growing time function while $\Lambda$, behaves as positive decreasing time function. If $\omega =0,$ both \textquotedblleft constants\textquotedblright, $G$ and $\Lambda ,$ behave as true constants.

7 pages, RevTeX

References in corpus (2)

• String cosmology in Bianchi I space-time
• Kinematic and Weyl singularities

Cited by in corpus (6)

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• Bianchi type-II cosmological model: some remarks
• The Bulk Viscous String Cosmology in An Anisotropic Universe With Late Time Acceleration