We investigate the influence that projection effects have on the completeness of the the Abell cluster catalogue in the context of an Ω0=1 CDM Universe. We construct a galaxy catalogue and identify clusters using an algorithm that mimics Abell's method. Over 30% of Richness Class ≥1 clusters have been selected despite not meeting the required intrinsic (3D) richness criterion. Velocity dispersions are shown to have been systematically overestimated.
Cite
@article{arxiv.astro-ph/9601081,
title = {Projection Effects in the Abell Catalogue},
author = {M. P. van Haarlem},
journal= {arXiv preprint arXiv:astro-ph/9601081},
year = {2007}
}
Comments
6 pages, including 2 figures, to appear in proceedings ``Mapping, Measuring and Modelling the Universe'', Valencia 1995, eds. P. Coles & V. Martinez