RCSLenS: a new estimator for large-scale galaxy-matter correlations
RCSLenS: a new estimator for large-scale galaxy-matter correlations
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DOI：
10.1093/mnras/stv2925
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发表时间：
2015-12
影响因子：
4.8
通讯作者：
Axel Buddendiek;P. Schneider;H. Hildebrandt;C. Blake;A. Choi;T. Erben;C. Heymans;L. Waerbeke;M. Viola;J. Harnois-Déraps;L. Koens;R. Nakajima
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文献类型：
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作者：
Axel Buddendiek;P. Schneider;H. Hildebrandt;C. Blake;A. Choi;T. Erben;C. Heymans;L. Waerbeke;M. Viola;J. Harnois-Déraps;L. Koens;R. Nakajima
我们测量了BOSS LOWZ亮红星系样本的星系偏置B和星系-物质互相关系数r。利用一种新的弱透镜效应统计分析方法，对红层序列星系团透镜巡天（RCSLenS）进行了研究，结果表明，在3.0 ~ 20.0的尺度范围内，该样本的偏倚性比以前报道的要高，分别为：B = 2：45 + 0：05 0：05和r = 1：64 + 0：17 0：16。我们对20 0 6 ~ 6 70 0的角标度重复测量，得到B = 2：39 + 0：07 0：07和r = 1：24 + 0：26 0：25。这是数据压缩分析的首次应用，使用一整套离散估计器进行星系-星系透镜和星系聚集。随着宇宙学数据集的增长，我们的新方法的数据压缩将变得越来越重要，以解释联合弱透镜和星系聚类测量和估计数据的协方差。在未来的研究中，这种形式主义可以作为一种工具来研究宇宙的大尺度结构，从而精确地确定宇宙学参数。
We present measurements of the galaxy bias b and the galaxy-matter cross-correlation coecient r for the BOSS LOWZ luminous red galaxy sample. Using a new statistical weak lensing analysis of the Red Sequence Cluster Lensing Survey (RCSLenS) we nd the bias properties of this sample to be higher than previously reported with b = 2:45 +0:05 0:05 and r = 1:64 +0:17 0:16 on scales between 3 0 and 20 0 . We repeat the measurement for angular scales of 20 0 6 # 6 70 0 , which yields b = 2:39 +0:07 0:07 and r = 1:24 +0:26 0:25. This is the rst application of a data compression analysis using a complete sets of discrete estimators for galaxy-galaxy lensing and galaxy clustering. As cosmological data sets grow, our new method of data compression will become increasingly important in order to interpret joint weak lensing and galaxy clustering measurements and to estimate the data covariance. In future studies this formalism can be used as a tool to study the large-scale structure of the Universe to yield a precise determination of cosmological parameters.