Clusters of galaxies from the Shane-Wirtanen counts

Details Clusters of galaxies from the Shane-Wirtanen counts Clusters of galaxies from the Shane-Wirtanen counts

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apjs...57...77s&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 57, Jan. 1985, p. 77-90.

Astronomy and Astrophysics

Astrophysics

133

Astronomical Catalogs, Galactic Clusters, Spatial Distribution, Angular Correlation, Histograms, Velocity Distribution

Scientific paper

A sample of 646 clusters of galaxies has been selected from the Shane-Wirtanen counts in 10arcmin bins by finding local density maxima above a threshold value, after lightly smoothing the data to reduce the effect of the sampling grid. The procedure finds 70% of Abell clusters at distance class 4, and 10% at distance class 5, but only 40% of the Shane-Wirtanen clusters are members of the Abell catalog. A sample of 97 redshifts of Shane-Wirtanen clusters exhibits the same distribution as Abell distance class D ≤ 4 clusters. The Shane-Wirtanen clusters have a higher space density than Abell clusters and may provide a clearer picture of the spatial distribution of clusters.

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