Virialization in Dark Energy Cosmology

Details Virialization in Dark Energy Cosmology Virialization in Dark Energy Cosmology

2005-07-08

arxiv.org/abs/astro-ph/0507195v3

Astrophys.J.640:18-21,2006

Astronomy and Astrophysics

Astrophysics

11 pages, 3 figures, explanation added. Accepted by Astrophysical Journal

Scientific paper

10.1086/500074

We discuss the issue of energy nonconservation in the virialzation process of spherical collapse model with homogeneous dark energy. We propose an approximation scheme to find the virialization radius. By comparing various schemes and estimating the parameter characterizing the ratio of dark energy to dark matter at the turn-around time, we conclude that the problem of energy nonconservation may have sizable effects in fitting models to observations.

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