Scalar-Tensor Bianchi VI Models. (5th June 2013)

• Record Type: Journal Article
• Authors: Belinchón, J. A.
• Other Names: Bamba Kazuharu Academic Editor.
• Is Part Of: Journal of gravity. Volume 2013(2013)
• Publication Date: 2013-06-05
• Subjects: Gravity -- Periodicals; Gravity; Periodicals; Electronic journals; 531.14
• DOI: 10.1155/2013/491905
• Languages: English
• ISSNs: 2356-7422

Abstract

Abstract : We study how may vary the gravitational and the cosmological "constants, " (G andΛ ) in several scalar-tensor theories with Bianchi III, V I 0, andV I h 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) withΛ ( ϕ ), and the usual JBD model with potentialU ( ϕ ) (that mimics the behaviour ofΛ ( ϕ ) ) . 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.