期刊
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
卷 183, 期 2, 页码 197-213出版社
IOP Publishing Ltd
DOI: 10.1088/0067-0049/183/2/197
关键词
galaxies: clusters: general; galaxies: distances and redshifts
资金
- National Natural Science Foundation (NNSF) of China [10773016, 10821061, 1083303]
- National Key Basic Research Science Foundation of China [2007CB815403]
- Doctoral Foundation of SYNU of China [054-55440105020]
- Alfred P. Sloan Foundation
- Participating Institutions
- National Science Foundation
- U.S. Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
Clusters of galaxies in most of the previous catalogs have redshifts z <= 0.3. Using the photometric redshifts of galaxies from the Sloan Digital Sky Survey Data Release 6 (SDSS DR6), we identify 39,716 clusters in the redshift range 0.05 < z < 0.6 with more than eight luminous (M-r <= -21) member galaxies. Cluster redshifts are estimated accurately with an uncertainty of less than 0.022. The contamination rate of member galaxies is found to be roughly 20%, and the completeness of member galaxy detection reaches similar to 90%. Monte Carlo simulations show that the cluster detection rate is more than 90% for massive (M-200 > 2 x 10(14) M-circle dot) clusters of z <= 0.42. The false detection rate is similar to 5%. We obtain the richness, the summed luminosity, and the gross galaxy number within the determined radius for identified clusters. They are tightly related to the X-ray luminosity and temperature of clusters. Cluster mass is related to the richness and summed luminosity with M-200 proportional to R-1.90 +/- 0.04 and M-200 proportional to L-r(1.64 +/- 0.03) , respectively. In addition, 790 new candidates of X-ray clusters are found by cross-identification of our clusters with the source list of the ROSAT X-ray survey.
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