COSMOLOGICAL CONSTRAINTS FROM THE SLOAN DIGITAL SKY SURVEY MaxBCG CLUSTER CATALOG

著者: Eduardo Rozo, Risa H. Wechsler, E. S. Rykoff, J. Annis, M. R. Becker, A. E. Evrard, J. Frieman, Sarah M. Hansen, Jiangang Hao, David E. Johnston, Benjamin P. Koester, Timothy A. McKay, E. Sheldon, David H. Weinberg - The Astrophysical Journal 2009 被引用: 453

We use the abundance and weak-lensing mass measurements of the Sloan Digital Sky Survey maxBCG cluster catalog to simultaneously constrain cosmology and the richness–mass relation of the clusters. Assuming a flat ΛCDM cosmology, we find σ8(Ωm/0.25)0.41 = 0.832 ± 0.033 after marginalization over all systematics. In common with previous studies, our error budget is dominated by systematic uncertainties, the primary two being the absolute mass scale of the weak-lensing masses of the maxBCG clusters, and uncertainty in the