Journal article
The growth of cool cores and evolution of cooling properties in a sample of 83 galaxy clusters at 0.3 < z < 1.2 selected from the SPT-SZ survey
M McDonald, BA Benson, A Vikhlinin, B Stalder, LE Bleem, T De Haan, HW Lin, KA Aird, MLN Ashby, MW Bautz, M Bayliss, S Bocquet, M Brodwin, JE Carlstrom, CL Chang, HM Cho, A Clocchiatti, TM Crawford, AT Crites, S Desai Show all
Astrophysical Journal | Published : 2013
Abstract
We present first results on the cooling properties derived from Chandra X-ray observations of 83 high-redshift (0.3 < z < 1.2) massive galaxy clusters selected by their Sunyaev-Zel'dovich signature in the South Pole Telescope data. We measure each cluster's central cooling time, central entropy, and mass deposition rate, and compare these properties to those for local cluster samples. We find no significant evolution from z 0 to z 1 in the distribution of these properties, suggesting that cooling in cluster cores is stable over long periods of time. We also find that the average cool core entropy profile in the inner 100 kpc has not changed dramatically since z 1, implying that feedback must..
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Awarded by National Science Foundation
Funding Acknowledgements
M.M. acknowledges support by NASA through a Hubble Fellowship grant HST-HF51308.01-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS 5-26555. The South Pole Telescope program is supported by the National Science Foundation through grant ANT-0638937. 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. Support for X-ray analysis was provided by NASA through Chandra Award Nos. 12800071, 12800088, and 13800883 issued by the Chandra X-Ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of NASA. Galaxy cluster research at Harvard is supported by NSF grant AST-1009012 and at SAO in part by NSF grants AST-1009649 and MRI-0723073. Argonne National Laboratory's work was supported under U.S. Department of Energy contract DE-AC02-06CH11357.