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arXiv 1303.4728astro-ph.COastro-ph.GA
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普朗克ESZ星系团的WMAP观测

WMAP Observations of Planck ESZ Clusters

Yin-Zhe Ma, Gary Hinshaw, Douglas Scott

摘要:

我们研究了Sunyaev-Zeldovich(SZ)效应在7年威尔金森微波各向异性探测器(WMAP)的数据交叉相关的普朗克早期发布Sunyaev-Zeldovich目录。我们的分析分两部分进行。我们首先进行堆叠分析,其中过滤的WMAP数据平均在175个普朗克集群的位置。然后,我们进行回归分析,比较SZ信号的平均振幅,Y_{500},在WMAP数据中的普朗克数据中的相应振幅。在7年的WMAP数据中检测到的聚合普朗克集群的信噪比为16.3。在回归分析中,我们发现SZ振幅测量值与拟合Y^{wmap}_{500} = aY^{planck}_{500}$的$a=1.23 \pm 0.18$的一致性优于25%。

英文摘要:

We examine the Sunyaev--Zeldovich (SZ) effect in the 7-yr 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 7-yr 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%: $a=1.23 \pm 0.18$ for the fit Y^{wmap}_{500} = aY^{planck}_{500}$.

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