Density Perturbations in the Brans-Dicke Theory
J. P. Baptista, J. C. Fabris, S. V. B. Goncalves
Abstract
We analyse the fate of density perturbation in the Brans-Dicke Theory, giving a general classification of the solutions of the perturbed equations when the scale factor of the background evolves as a power law. We study with details the cases of vacuum, inflation, radiation and incoherent matter. We find, for the a negative Brans-Dicke parameter, a significant amplification of perturbations.
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