Table of Contents
Journal of Gravity
Volume 2013, Article ID 491905, 11 pages
http://dx.doi.org/10.1155/2013/491905
Research Article

Scalar-Tensor Bianchi VI Models

Departamento de Física Atómica, Molecular y Nuclear, Universidad Complutense de Madrid, 28040 Madrid, Spain

Received 20 February 2013; Accepted 13 May 2013

Academic Editor: Kazuharu Bamba

Copyright © 2013 J. A. Belinchón. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We study how may vary the gravitational and the cosmological “constants,” ( and ) in several scalar-tensor theories with Bianchi III, , and symmetries. By working under the hypothesis of self-similarity we find exact solutions for two different theoretical models, which are the Jordan-Brans-Dicke (JBD) with and the usual JBD model with potential (that mimics the behaviour of . We compare both theoretical models, and some physical and geometrical properties of the solutions are also discussed putting special emphasis on the study of the isotropization of the solutions.