Local spherically symmetric perturbations of spatially flat Friedmann models

Details Local spherically symmetric perturbations of spatially flat Friedmann models Local spherically symmetric perturbations of spatially flat Friedmann models

2006-10-27

arxiv.org/abs/gr-qc/0610137v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

iopart, 10 pages

Scientific paper

The spherically symmetric perturbations in the spatially flat Friedman models are considered. It is assumed that the Friedmannian density and pressure are related through a linear equation of state. The perturbation is joined smoothly with an unperturbed Friedmann's background at the sound horizon of perturbation. Such junction is in accordance with the "birth" of a local perturbation as a result of the redistribution of matter. The solution of the Einstein's equations is obtained in linear approximation on a Friedmann's background near the the sound horizon of perturbation.

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