Journal
ASTROPHYSICAL JOURNAL
Volume 771, Issue 2, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0004-637X/771/2/137
Keywords
cosmic background radiation; cosmology: observations; galaxies: clusters: general; large-scale structure of universe
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada
- CITA National Fellowship
- Canadian Institute for Advanced Research
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We examine the Sunyaev-Zeldovich (SZ) effect in the seven year Wilkinson Microwave Anisotropy Probe (WMAP) data by cross-correlating it with the Planck Early-release Sunyaev-Zeldovich catalog. Our analysis proceeds in two parts. We first perform a stacking analysis in which the filtered WMAP data are averaged at the locations of the 175 Planck clusters. We then perform a regression analysis to compare the mean amplitude of the SZ signal, Y-500, in the WMAP data to the corresponding amplitude in the Planck data. The aggregate Planck clusters are detected in the seven year WMAP data with a signal-to-noise ratio of 16.3. In the regression analysis, we find that the SZ amplitude measurements agree to better than 25%: a = 1.23 +/- 0.18 for the fit Y-500(wmap) = aY(500)(planck).
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