Clustering of galaxy clusters. I - Is the spatial cluster-cluster correlation function enhanced significantly by contaminations?

Details Clustering of galaxy clusters. I - Is the spatial cluster-cluster correlation function enhanced significantly by contaminations? Clustering of galaxy clusters. I - Is the spatial cluster-cluster correlation function enhanced significantly by contaminations?

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...389..499j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 389, April 20, 1992, p. 499-509.

Astronomy and Astrophysics

Astrophysics

30

Cosmology, Dark Matter, Galactic Clusters, Red Shift, Astronomical Catalogs, Astronomical Models, Correlation, Digital Simulation, Power Spectra

Scientific paper

A consistency check between different cluster samples is proposed to determine whether the positive redshift correlations found by Sutherland (1988) at large redshift and small angular separations are due mainly to foreground/background cluster contaminations or to real clustering. The results do not support the contamination origin of the Sutherland effect and support real clustering as the origin of this effect. A set of simulated cluster catalogs with the same two-point correlation function and the same selection effects as the real samples are constructed and used to show that the Sutherland effect is quite common in the simulated catalogs, which are completely free of contamination effects. A chi-square test shows that the observed redshift correlation functions can be reproduced in the simulations more than 15-30 percent of the time, supporting that contamination of the Abell cluster catalog are not necessarily the cause of this effect.

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