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Decaying Lambda cosmology with varying G

We study a uniform and isotropic cosmology with a decaying vacuum energy density, in the realm of a model with a time varying gravitational "constant". We show that, for late times, such a cosmology is in accordance with the observed values of the cosmological parameters. In particular, we can obtain the observed ratio between the matter density and the total energy density, with no necessity of any fine tuning.

preprint2003arXivOpen access
Saulo Carneiro
astro-phgr-qc
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Saulo Carneiro

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