The Mass of the Coma Cluster from Weak Lensing in the Sloan Digital Sky Survey
The Mass of the Coma Cluster from Weak Lensing in the Sloan Digital Sky Survey
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DOI：
10.1086/523101
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发表时间：
2007-09
期刊：
影响因子：
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通讯作者：
Jeffrey M. Kubo;A. Stebbins;J. Annis;I. Dell’Antonio;Huan Lin;Hossein Khiabanian;J. Frieman
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文献类型：
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作者：
Jeffrey M. Kubo;A. Stebbins;J. Annis;I. Dell’Antonio;Huan Lin;Hossein Khiabanian;J. Frieman
我们使用斯隆数字巡天数据版本 5 对后发星团进行弱透镜分析。约 200 deg2 区域的完整成像用于测量该星团的切向剪切。剪切力适合 Navarro、Frenk 和 White 模型，我们发现维里半径为 r200 = 1.99−0.22+ 0.21 h−1 Mpc，对应的维里质量为 M200 = 1.88−0.56+0.65 × 1015 h−1 M☉。我们还将弱透镜测量结果与使用动力学技术得出的维里质量进行了比较，发现它们是一致的。这是迄今为止对单个星团的最低红移、最大角度弱透镜测量。
We present a weak-lensing analysis of the Coma Cluster using the Sloan Digital Sky Survey Data Release 5. Complete imaging of an ~200 deg2 region is used to measure the tangential shear of this cluster. The shear is fit to a Navarro, Frenk, & White model, and we find a virial radius of r200 = 1.99−0.22+ 0.21 h−1 Mpc, which corresponds to a virial mass of M200 = 1.88−0.56+0.65 × 1015 h−1 M☉. We additionally compare our weak-lensing measurement to the virial mass derived using dynamical techniques and find that they are in agreement. This is the lowest redshift, largest angle weak-lensing measurement of an individual cluster to date.