Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-01-09
Astronomy and Astrophysics
Astrophysics
39 pages, 16 figures, 1 table. Accepted to ApJ
Scientific paper
10.1086/512092
Measurements of galaxy cluster abundances, clustering properties, and mass to- light ratios in current and future surveys can provide important cosmological constraints. Digital wide-field imaging surveys, the recently-demonstrated fidelity of red-sequence cluster detection techniques, and a new generation of realistic mock galaxy surveys provide the means for construction of large, cosmologicallyinteresting cluster samples, whose selection and properties can be understood in unprecedented depth. We present the details of the "maxBCG" algorithm, a cluster-detection technique tailored to multi-band CCD-imaging data. MaxBCG primarily relies on an observational cornerstone of massive galaxy clusters: they are marked by an overdensity of bright, uniformly red galaxies. This detection scheme also exploits classical brightest cluster galaxies (BCGs), which are often found at the center of these same massive clusters. (ABRIDGED)
Annis James
Bleem Lindsey
Evrard August E.
Johnston David
Koester Benjamin P.
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