Catalog of clusters of galaxies from SDSS (Bahcall+, 2003)

Details Catalog of clusters of galaxies from SDSS (Bahcall+, 2003) Catalog of clusters of galaxies from SDSS (Bahcall+, 2003)

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ycat..21480243b&link_type=abstract

VizieR On-line Data Catalog: J/ApJS/148/243. Originally published in: 2003ApJS..148..243B

Other

Clusters: Galaxy, Redshifts

Scientific paper

We present a catalog of 799 clusters of galaxies in the redshift range zest=0.05-0.3 selected from ~400deg2 of early Sloan Digital Sky Survey (SDSS) commissioning data along the celestial equator. The catalog is based on merging two independent selection methods - a color-magnitude red-sequence maxBCG technique (B), and a hybrid matched filter method (H). The BH catalog includes clusters with richness {Lambda}>=40 (matched filter) and Ngal>=13 (maxBCG), corresponding to typical velocity dispersion of {sigma}v>~400km/s and mass (within 0.6h-1Mpc radius) >~5x1013h-1M{sun}. This threshold is below Abell richness class 0 clusters. The average space density of these clusters is 2x10-5h3/Mpc3. All NORAS () X-ray clusters and 53 of the 58 Abell clusters in the survey region are detected in the catalog; the five additional Abell clusters are detected below the BH catalog cuts. The cluster richness function is determined and found to exhibit a steeply decreasing cluster abundance with increasing richness. We derive observational scaling relations between cluster richness and observed cluster luminosity and cluster velocity dispersion; these scaling relations provide important physical calibrations for the clusters. The catalog can be used for studies of individual clusters, for comparisons with other sources such as X-ray clusters and active galactic nuclei, and, with proper correction for the relevant selection functions, also for statistical analyses of clusters.
(1 data file).

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