Journal article
Mass calibration and cosmological analysis of the SPT-SZ galaxy cluster sample using velocity dispersion σνand X-ray YX measurements
S Bocquet, A Saro, JJ Mohr, KA Aird, MLN Ashby, M Bautz, M Bayliss, G Bazin, BA Benson, LE Bleem, M Brodwin, JE Carlstrom, CL Chang, I Chiu, HM Cho, A Clocchiatti, TM Crawford, AT Crites, S Desai, T De Haan Show all
Astrophysical Journal | Published : 2015
Abstract
We present a velocity-dispersion-based mass calibration of the South Pole Telescope Sunyaev-Zel'dovich effect survey (SPT-SZ) galaxy cluster sample. Using a homogeneously selected sample of 100 cluster candidates from 720 deg2 of the survey along with 63 velocity dispersion (σν) and 16 X-ray YX measurements of sample clusters, we simultaneously calibrate themass-observable relation and constrain cosmological parameters. Ourmethod accounts for cluster selection, cosmological sensitivity, and uncertainties in the mass calibrators. The calibrations using σνand YX are consistent at the 0.6σ level, with the σν calibration preferring ∼16% higher masses. We use the full SPTCL data set (SZ clusters+..
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Awarded by Gordon and Betty Moore Foundation
Funding Acknowledgements
We acknowledge the support of the DFG Cluster of Excellence "Origin and Structure of the Universe" and the Transregio program TR33 "The Dark Universe." The calculations have been carried out on the computing facilities of the Computational Center for Particle and Astrophysics (C2PAP) and of the Leibniz Supercomputer Center (LRZ). Optical spectroscopic data from VLT programs 086.A-0741 and 286.A-5021 and Gemini program GS-2009B-Q-16 were included in this work. Additional data were obtained with the 6.5 m Magellan Telescopes, which is located at the Las Campanas Observatory in Chile. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. The South Pole Telescope is supported by the National Science Foundation through grant PLR-1248097. Partial support is also provided by the NSF Physics Frontier Center grant PHY-1125897 to the Kavli Institute of Cosmological Physics at the University of Chicago, the Kavli Foundation and the Gordon and Betty Moore Foundation grant GBMF 947. Galaxy cluster research at Harvard is supported by NSF grant AST-1009012, and research at SAO is supported in part by NSF grants AST-1009649 and MRI-0723073. Work at Argonne National Lab is supported by UChicago Argonne, LLC, Operator of Argonne National Laboratory ("Argonne"). Argonne, a U.S. Department of Energy Office of Science Laboratory, is operated under Contract No. DE-AC02-06CH11357. The McGill group acknowledges funding from the National Sciences and Engineering Research Council of Canada, Canada Research Chairs Program, and the Canadian Institute for Advanced Research.