COSMOLOGICAL CONSTRAINTS FROM THE SLOAN DIGITAL SKY SURVEY MaxBCG CLUSTER CATALOG
Eduardo RozoCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA; [email protected]R.H. WechslerKavli Institute for Particle Astrophysics & Cosmology, Department of Physics, and SLAC National Accelerator Laboratory Stanford University, Stanford, CA 94305, USAE. S. RykoffPhysics Department, University of California at Santa Barbara, 2233B Broida Hall, Santa Barbara, CA 93106, USAJ. AnnisFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAM. R. BeckerDepartment of Physics, The University of Chicago, Chicago, IL 60637, USAA. E. EvrardAstronomy Department, University of Michigan, Ann Arbor, MI 48109, USAJ. FriemanDepartment of Astronomy and Astrophysics, The University of Chicago, Chicago, IL 60637, USASarah M. HansenUniversity of California Observatories & Department of Astronomy, University of California, Santa Cruz, CA 95064, USAJiangang HaoPhysics Department, University of Michigan, Ann Arbor, MI 48109, USADavid E. JohnstonDepartment of Physics & Astronomy, Northwestern University, Evanston, IL 60208, USABenjamin P. KoesterDepartment of Astronomy and Astrophysics, The University of Chicago, Chicago, IL 60637, USATimothy A. McKayAstronomy Department, University of Michigan, Ann Arbor, MI 48109, USAE. SheldonBrookhaven National Laboratory, Upton, NY 11973, USADavid H. WeinbergCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA; [email protected]
2009en
ABI
Аннотация
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
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