Remarks on some vacuum solutions of scalar-tensor cosmological models

AUTOR(ES)

Bezerra, V. B., Romero, C., Grebot, G., Guimarães, M. E. X., Colatto, L. P.

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2004-06

RESUMO

We present a class of exact vacuum solutions corresponding to de Sitter and warm inflation models in the framework of scalar-tensor cosmologies. We show that in both cases the field equations reduce to planar dynamical systems with constraints. Then, we carry out a qualitative analysis of the models by examining the phase diagrams of the solutions near the equilibrium points.

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