Virialization in Dark Energy Cosmology

Abstract

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.

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

References in corpus (3)

• On the spherical collapse model in dark energy cosmologies
• On virialization with dark energy
• Dark energy and the evolution of spherical overdensities

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