Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2005-10-28
Braz.J.Phys.35:1052-1054,2005
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
To appear in Brazilian Journal of Physics (proceedings of the conference 100 Years of Relativity, Sao Paulo, August 2005)
Scientific paper
10.1590/s0103-97332005000700009
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.
Carneiro Saulo
Montenegro A. E. Jr.
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