The initial fate of an anisotropic JBD universe

Abstract

The dynamical effects on the scale factors due to the scalar $\varphi$-field at the early stages of a supposedly anisotropic Universe expansion in the scalar-tensor cosmology of Jordan-Brans and Dicke is studied. This universe shows an {\sl isotropic} evolution and, depending on the value of the theorie's coupling parameter $\omega$, it can begin from a singularity if $\omega >0$ and after expanding shrink to another one; or, if $\omega <0$ and $-3/2<\omega \le -4/3$, it can evolve from a flat spatially-infinite state to a non extended singularity; or, if $-4/3<\omega <0$, evolve from an extended singularity to a non singular state and, at last, proceed towards a singularity.

References in corpus (2)

• Scale Factor Dualities in Anisotropic Cosmologies
• The initial fate of an anisotropic JBD universe

Cited by in corpus (2)

• The initial fate of an anisotropic JBD universe
• Isotropic evolution of a JBD anisotropic Bianchi universe