Projection Effects in the Abell Catalogue
Abstract
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.
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