Abstract
We employ robust weak gravitational lensing measurements to improve cosmological constraints from measurements of the galaxy cluster mass function and its evolution, using X-ray selected clusters detected in the ROSAT All-Sky Survey. Our lensing analysis constrains the absolute mass scale of such clusters at the 8 per cent level, including both statistical and systematic uncertainties. Combining it with the survey data and X-ray follow-up observations, we find a tight constraint on a combination of the mean matter density and late-time normalization of the matter power spectrum, σ8(Ωm/0.3)0.17 = 0.81 ± 0.03, with marginalized, one-dimensional constraints of Ωm = 0.26 ± 0.03 and s8 = 0.83 ± 0.04. For these two parameters, this represents a factor of 2 improvement in precision with respect to previous work, primarily due to the reduced systematic uncertainty in the absolute mass calibration provided by the lensing analysis. Our new results are in good agreement with constraints from cosmic microwave background (CMB) data, both Wilkinson Microwave Anisotropy Probe (WMAP) and Planck (plus WMAP polarization), under the assumption of a flat ΛCDM cosmology with minimal neutrino mass. Consequently, we find no evidence for non-minimal neutrino mass from the combination of cluster data with CMB, supernova and baryon acoustic oscillation measurements, regardless of which all-sky CMB data set is used (and independent of the recent claimed detection of B modes on degree scales).We also present improved constraints on models of dark energy (both constant and evolving), modifications of gravity, and primordial non-Gaussianity. Assuming flatness, the constraints for a constant dark energy equation of state from the cluster data alone are at the 15 per cent level, improving to ~6 per cent when the cluster data are combined with other leading probes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2205-2225 |
| Number of pages | 21 |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 446 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 21 2015 |
Bibliographical note
Funding Information:We thankAlastair Edge for sharing his list of likelyAGN-dominated BCS and REFLEX clusters, as well as Risa Wechsler and Sam Skillman for insightful discussions. We thank the Dark Cosmology Centre for hosting collaboration meetings during the development of this paper. We also thank the referee for providing prompt, thorough, and very useful comments. Calculations for this work utilized theComa, Orange andBullet compute clusters at theSLACNational Accelerator Laboratory, and the HPC facility at the University of Copenhagen. ABM was supported by National Science Foundation grants AST-0838187 and AST-1140019. DEA acknowledges funding from the German Federal Ministry of Economics and Technology(BMWi) under project 50OR1210. SA and SS are supported by the National Aeronautics and Space Administration (NASA) under Grant no. NNX12AC99G issued through the Astrophysics Theory Program. We acknowledge support from the US Department of Energy under contract number DE-AC02-76SF00515; from NASA through Chandra Award numbers GO8-9118X and TM1-12010X, issued by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of NASA under contract NAS8-03060; as well as through programme HST-AR-12654.01-A, provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. The Dark Cosmology Centre is funded by the Danish National Research Foundation. Based in part on data collected at Subaru Telescope (University of Tokyo) and obtained from the SMOKA, which is operated by the Astronomy Data Center, National Astronomical Observatory of Japan. Based on observations obtained withMegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the Canada-France- Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institute National des Sciences de l'Univers of the Centre National de la Recherche Scientifique of France, and the University of Hawaii.
Funding Information:
We thank Alastair Edge for sharing his list of likely AGN-dominated BCS and REFLEX clusters, as well as Risa Wechsler and Sam Skillman for insightful discussions. We thank the Dark Cosmology Centre for hosting collaboration meetings during the development of this paper. We also thank the referee for providing prompt, thorough, and very useful comments. Calculations for this work utilized the Coma, Orange and Bullet compute clusters at the SLAC National Accelerator Laboratory, and the HPC facility at the University of Copenhagen. ABM was supported by National Science Foundation grants AST-0838187 and AST-1140019. DEA acknowledges funding from the German Federal Ministry of Economics and Technology (BMWi) under project 50 OR 1210. SA and SS are supported by the National Aeronautics and Space Administration (NASA) under Grant no. NNX12AC99G issued through the Astrophysics Theory Program. We acknowledge support from the US Department of Energy under contract number DE-AC02-76SF00515; from NASA through Chandra Award numbers GO8-9118X and TM1-12010X, issued by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of NASA under contract NAS8-03060; as well as through programme HST-AR-12654.01-A, provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. The Dark Cosmology Centre is funded by the Danish National Research Foundation.
Publisher Copyright:
© The 2014. Authors.
Keywords
- Cosmological parameters
- Cosmology: observations
- Large-scale structure of Universe -X-rays: galaxies: clusters