Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem

AUTOR(ES)

Carneiro, S., Montenegro Jr., A. E.

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2005-12

RESUMO

We present some cosmological solutions of Brans-Dicke theory, characterized by a decaying vacuum energy density and by a constant relative matter density. With these features, they shed light on the cosmological constant problems, leading to a presently small vacuum term, and to a constant ratio between the vacuum and matter energy densities. By fixing the only free parameter of our solutions, we obtain cosmological parameters in accordance with observations of the relative matter density, the universe age and redshift-distance relations.

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