Density perturbations derived from general cosmological solutions of BransDicke theory
Abstract
The problem of the time evolution of density perturbations in BransDicke theory is examined for the case of a homogeneous and isotropic universe which is filled by a perfect fluid whose energymomentum tensor is conservative and whose equation of state is barotropic. Largescale inhomogeneities with constant entropy are considered. Departures from the theory of general relativity are noted, and the existence of nonsingular solutions is demonstated for omega values of less than 3/2. It is shown that modifications to general relativity (with respect to the condensation rate of density perturbations) obtained by the addition of the scalar field are not sufficient to produce growth rates which are significantly larger than those obtained within the framework of general relativity.
 Publication:

Academie des Sciences Paris Comptes Rendus Serie Sciences Mathematiques
 Pub Date:
 August 1989
 Bibcode:
 1989CRASM.309..791F
 Keywords:

 Astronomical Models;
 Cosmology;
 Perturbation Theory;
 Computational Astrophysics;
 Density (Mass/Volume);
 Relativistic Theory;
 SpaceTime Functions;
 Astrophysics