Spherically symmetric cosmological perturbation in a universe with background field
Author: Petry, W.
Source: Astrophysics and Space Science, Volume 250, Number 2, 1997 , pp. 297-311(15)
Abstract:In a previous paper the equations of small cosmological perturbations of a theory of gravitation in flat space-time are derived. They are applied to a homogeneous, isotropic, nonsingular cosmological model with radiation, matter and background field. At the beginning of the universe small spherically symmetric inhomogeneities on almost all scales can arise by instability. Later on the density contrast of dust grows exponentially during a short time epoch. The solution during this time period is given analytically.
Document Type: Regular Paper
Affiliations: Mathematisches Institut der Universität Düsseldorf, D-40225 Düsseldorf, Germany
Publication date: 1997-01-01