A Merged Catalog of Clusters of Galaxies from Early SDSS Data

Details A Merged Catalog of Clusters of Galaxies from Early SDSS Data A Merged Catalog of Clusters of Galaxies from Early SDSS Data

2003-05-12

arxiv.org/abs/astro-ph/0305202v1

Astrophys.J.Suppl.Ser.148:243-274,2003

Astronomy and Astrophysics

Astrophysics

AASTeX, 62 pages, including 14 figures and 4 tables, submitted to ApJS. Paper with full-resolution figures at http://astro.p

Scientific paper

10.1086/377167

We present a catalog of 799 clusters of galaxies in the redshift range z_est = 0.05 - 0.3 selected from ~400 deg^2 of early 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 N_gal >= 13 (maxBCG), corresponding to typical velocity dispersion of \sigma_v >~ 400 km s^{-1} and mass (within 0.6 h^{-1) Mpc radius) >~ 5*10^{13} h^{-1} M_sun. This threshold is below Abell richness class 0 clusters. The average space density of these clusters is 2*10^{-5} h^3 Mpc^{-3}. All NORAS X-ray clusters and 53 of the 58 Abell clusters in the survey region are detected in the catalog; the 5 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 AGNs, and, with proper correction for the relevant selection functions, also for statistical analyses of clusters.

Affiliated with

Also associated with

No associations

Rating

A Merged Catalog of Clusters of Galaxies from Early SDSS Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Merged Catalog of Clusters of Galaxies from Early SDSS Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Merged Catalog of Clusters of Galaxies from Early SDSS Data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-90713