Journal article
The Cluster Mass Function from Early SDSS Data: Cosmological Implications
arXiv.org
28 May 2002
Abstract
Astrophys.J. 585 (2003) 182-190 The mass function of clusters of galaxies is determined from 400 deg^2 of
early commissioning imaging data of the Sloan Digital Sky Survey; ~300 clusters
in the redshift range z = 0.1 - 0.2 are used. Clusters are selected using two
independent selection methods: a Matched Filter and a red-sequence color
magnitude technique. The two methods yield consistent results. The cluster mass
function is compared with large-scale cosmological simulations. We find a
best-fit cluster normalization relation of sigma_8*omega_m^0.6 = 0.33 +- 0.03
(for 0.1 ~< omega_m ~< 0.4), or equivalently sigma_8 = (0.16/omega_m)^0.6. The
amplitude of this relation is significantly lower than the previous canonical
value, implying that either omega_m is lower than previously expected (omega_m
= 0.16 if sigma_8 = 1) or sigma_8 is lower than expected (sigma_8 = 0.7 if
omega_m = 0.3). The best-fit mass function parameters are omega_m = 0.19
(+0.08,-0.07) and sigma_8 = 0.9 (+0.3,-0.2). High values of omega_m (>= 0.4)
and low sigma_8 (=< 0.6) are excluded at >~ 2 sigma.
Metrics
Details
- Title
- The Cluster Mass Function from Early SDSS Data: Cosmological Implications
- Creators
- Neta A Bahcall - Princeton UniversityFeng Dong - Princeton UniversityPaul Bode - Princeton UniversityRita Kim - Johns Hopkins UniversityJames Annis - FermilabTimothy A McKay - University of Michigan–Ann ArborSarah Hansen - University of Michigan–Ann ArborJames Gunn - Princeton UniversityJeremiah P Ostriker - Princeton UniversityMarc Postman - Space Telescope Science InstituteRobert C Nichol - Carnegie Mellon UniversityTomotsugu Goto - Carnegie Mellon UniversityJon Brinkmann - Apache CorporationGillian R Knapp - Princeton UniversityDon O Lamb - University of ChicagoDonald P Schneider - Pennsylvania State UniversityMichael S Vogeley - Drexel UniversityDonald G York - University of ChicagoRoy U T Kim - [Retired Faculty]
- Publication Details
- arXiv.org
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000181046500015
- Scopus ID
- 2-s2.0-18344412794
- Other Identifier
- 991019167979204721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Astronomy & Astrophysics