Journal article
High-redshift cool-core galaxy clusters detected via the Sunyaev-Zel'dovich effect in the south pole telescope survey
DR Semler, R Šuhada, KA Aird, MLN Ashby, M Bautz, M Bayliss, G Bazin, S Bocquet, BA Benson, LE Bleem, M Brodwin, JE Carlstrom, CL Chang, HM Cho, A Clocchiatti, TM Crawford, AT Crites, T De Haan, S Desai, MA Dobbs Show all
Astrophysical Journal | IOP Publishing Ltd | Published : 2012
Abstract
We report the first investigation of cool-core properties of galaxy clusters selected via their Sunyaev-Zel'dovich (SZ) effect. We use 13 galaxy clusters uniformly selected from 178 deg2 observed with the South Pole Telescope (SPT) and followed up by the Chandra X-ray Observatory. They form an approximately mass-limited sample (>3 × 1014 M ⊙h -170) spanning redshifts 0.3 < z < 1.1. Using previously published X-ray-selected cluster samples, we compare two proxies of cool-core strength: surface brightness concentration (cSB) and cuspiness (α). We find that c SBis better constrained. We measure c SBfor the SPT sample and find several new z > 0.5 cool-core clusters, including two strong cool cor..
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Awarded by National Science Foundation
Funding Acknowledgements
The South Pole Telescope program is supported by the National Science Foundation through grant ANT-0638937. The Munich group is supported by The Cluster of Excellence "Origin and Structure of the Universe," funded by the Excellence Initiative of the Federal Government of Germany, EXC project No. 153. Galaxy cluster research at the University of Chicago is partially supported by Chandra award No. GO2-13006A issued by the Chandra X-ray Observatory Center. Partial support is also provided by the NSF Physics Frontier Center grant PHY-0114422 to the Kavli Institute of Cosmological Physics at the University of Chicago, the Kavli Foundation, and the Gordon and Betty Moore Foundation. Galaxy cluster research at Harvard is supported by NSF grant AST-1009012. Galaxy cluster research at SAO is supported in part by NSF grants AST-1009649 and MRI-0723073. 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. X-ray research at the CfA is supported through NASA contract NAS 8-03060. Support for X-ray analysis is provided by the National Aeronautics and Space Administration through Chandra award No. GO0-1114 issued by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics Space Administration under contract NAS8-03060. R.J.F. is supported by a Clay Fellowship. B. A. B is supported by a KICP Fellowship. M. Bautz and M. M acknowledge support from contract 2834-MIT-SAO-4018 from the Pennsylvania State University to the Massachusetts Institute of Technology. M. M acknowledges support from NASA Hubble fellowship grant HST-HF-51308.01. M. D. acknowledges support from an Alfred P. Sloan Research Fellowship, C.J. acknowledges support from the Smithsonian Institution, and B. S. acknowledges support from the Brinson Foundation. The authors thank Marcella Brusa for her helpful discussion.