Non radial motions and the large scale structure of the Universe

Details Non radial motions and the large scale structure of the Universe Non radial motions and the large scale structure of the Universe

2001-05-21

arxiv.org/abs/astro-ph/0105359v1

Clustering at High redshift, ASP conference series, (2000) Vol. 200, pg. 148. Edited by A. Mazure, O. Le Fevre and V. Le Brun

Astronomy and Astrophysics

Astrophysics

11 pages, 3 encapsulated figures

Scientific paper

We study the effect of non-radial motions on the mass function, the VDF and on the shape of clusters of galaxies using the model introduced in Del Popolo & Gambera (1998a,b; 1999). The mass function of clusters, obtained using the quoted model, is compared with the statistical data by Bahcall & Cen (1992) and Girardi et al. (1998), while the VDF is compared with the CfA data by Zabludoff et al. (1993) for local clusters. In both cases the model predictions are in good agreement with the observational data showing once more how non-radial motions can reduce many of the discrepancies between CDM model predictions and observational data. Besides we study the effect of non-radial motions on the intrinsic shape of clusters of galaxies showing that non-radial motions produce clusters less elongated with respect to CDM model.

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