The MX Northern Abell Cluster Survey II: The Abell/ACO Cluster Redshifts and Spatial Analyses

Details The MX Northern Abell Cluster Survey II: The Abell/ACO Cluster Redshifts and Spatial Analyses The MX Northern Abell Cluster Survey II: The Abell/ACO Cluster Redshifts and Spatial Analyses

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aj....124.1918m&link_type=abstract

The Astronomical Journal, Volume 124, Issue 4, pp. 1918-1933.

Astronomy and Astrophysics

Astronomy

8

Galaxies: Clusters: General, Cosmology: Large-Scale Structure Of Universe, Surveys

Scientific paper

The MX Northern Abell Cluster Survey II is the final stage of a program designed to observe rich Abell clusters with m10<=17.0. We present 1542 new galaxy redshifts within 117 R>=1 Abell cluster fields that have 16.9<=m10<=17.0, 0h<=α<=24h, -17°<=δ<=90°, and |b|>=30°. Of the 117 clusters observed for the MX Survey II, 105 new cluster redshifts were obtained with an average of eight cluster member galaxy redshifts. We update the m10-z estimator for Abell clusters and calculate the spatial number density of Abell clusters to be nc=(8.25+/-1.9)×10-6 h3 Mpc-3 within z=0.10. All R>=1 Abell and ACO clusters with measured redshifts were combined to calculate the two-point spatial correlation function ξ(r)=(r/ro)γ for the largest complete sample of rich clusters to date. We find 18.6<=ro<=21.0 h-1 Mpc and -2.03<=γ<=-1.95. The slope and correlation length are very robust and remain unaffected by the exclusion of compact and dense superclusters or by accounting for line-of-sight anisotropies, which are explained by the existence of three observationally confirmed and extended superclusters.

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