Journal article
Galaxy cluster scaling relations measured with APEX-SZ
AN Bender, J Kennedy, PAR Ade, K Basu, F Bertoldi, S Burkutean, J Clarke, D Dahlin, M Dobbs, D Ferrusca, D Flanigan, NW Halverson, WL Holzapfel, C Horellou, BR Johnson, ZD Kermish, M Klein, R Kneissl, T Lanting, AT Lee Show all
Monthly Notices of the Royal Astronomical Society | OXFORD UNIV PRESS | Published : 2016
Abstract
We present thermal Sunyaev-Zel'dovich effect (SZE) measurements for 42 galaxy clusters observed at 150 GHz with the APEX-SZ experiment. For each cluster, we model the pressure profile and calculate the integrated Comptonization Y to estimate the total thermal energy of the intracluster medium (ICM). We compare the measured Y values to X-ray observables of the ICM from the literature (cluster gas mass Mgas, temperature TX, and YX = MgasTX) that relate to total cluster mass. We measure power-law scaling relations, including an intrinsic scatter, between the SZE and X-ray observables for three subsamples within the set of 42 clusters that have uniform X-ray analysis in the literature. We observ..
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Awarded by National Science Foundation
Funding Acknowledgements
We thank the staff at the APEX telescope site, at the time of observations led by David Rabanus and previously by Lars-Ake Nyman, for their dedicated and exceptional support. We also thank Bradford Benson for useful comments on a draft version of the manuscript as well as LBNL engineers John Joseph and Chinh Vu for their work on the readout electronics. APEX-SZ is funded by the National Science Foundation under Grant Nos. AST-0138348 and AST-0709497. Work at LBNL is supported by the Director, Office of Science, Office of High Energy and Nuclear Physics, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Work at McGill is supported by the Natural Sciences and Engineering Research Council of Canada, the Canada Research Chairs programme, and the Canadian Institute for Advanced Research. This work has been partially supported by the DFG Transregio programme TR33 'The Dark Universe'. FP acknowledges support from the BMBF/DLR grant Nr. 50 OR 1117. CH acknowledges support from the Barbro Osher pro Succia foundation and from the Swedish Research Council under grants 2006-3356 and 2009-4027. MK acknowledges support by the German BMWi through the Verbundforschung under grant 50 OR 1107. NWH acknowledges support from the Alfred P. Sloan Foundation.