Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 460, Issue 4, Pages 3432-3446Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw1158
Keywords
galaxies: clusters: general; cosmic background radiation; cosmology: observations
Categories
Funding
- National Science Foundation [AST-0138348, AST-0709497]
- Office of Science, Office of High Energy and Nuclear Physics, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Natural Sciences and Engineering Research Council of Canada
- Canada Research Chairs programme
- Canadian Institute for Advanced Research
- DFG Transregio programme [TR33]
- BMBF/DLR grant [50 OR 1117]
- Barbro Osher pro Succia foundation
- Swedish Research Council [2006-3356, 2009-4027]
- German BMWi through the Verbundforschung [50 OR 1107]
- Alfred P. Sloan Foundation
- Science and Technology Facilities Council [ST/N000706/1] Funding Source: researchfish
- STFC [ST/K000926/1, ST/N000706/1] Funding Source: UKRI
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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 intraclustermedium (ICM). We compare the measured Y values to X-ray observables of the ICM from the literature (cluster gas mass M-gas, temperature T-X, and Y-X = 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 observe that differences between these X-ray analyses introduce significant variance into the measured scaling relations, particularly affecting the normalization. For all three subsamples, we find results consistent with a selfsimilarmodel of cluster evolution dominated by gravitational effects. Comparing to predictions from numerical simulations, these scaling relations prefer models that include cooling and feedback in the ICM. Lastly, we measure an intrinsic scatter of similar to 28 per cent in the Y - Y-X scaling relation for all three subsamples.
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