Virialization in Dark Energy Cosmology | Zendy

Peng Wang | Zendy

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Virialization in Dark Energy Cosmology

Author(s) -

Peng Wang

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/500074

Subject(s) - physics , dark energy , cosmology , dark matter , astrophysics , homogeneous , radius , energy (signal processing) , statistical physics , quantum mechanics , computer security , computer science

We discuss the issue of energy nonconservation in the virialzation process ofspherical collapse model with homogeneous dark energy. We propose anapproximation scheme to find the virialization radius. By comparing variousschemes and estimating the parameter characterizing the ratio of dark energy todark matter at the turn-around time, we conclude that the problem of energynonconservation may have sizable effects in fitting models to observations.Comment: 11 pages, 3 figures, explanation added. Accepted by Astrophysical Journa

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