Cluster mass profile reconstruction with size and flux magnification on the HST STAGES survey.
Cluster mass profile reconstruction with size and flux magnification on the HST STAGES survey.
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DOI：
10.1093/mnras/stw027
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发表时间：
2016-01
影响因子：
4.8
通讯作者：
C. Duncan;C. Heymans;A. Heavens;B. Joachimi
中科院分区：
文献类型：
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作者：
C. Duncan;C. Heymans;A. Heavens;B. Joachimi
我们首次使用弱透镜尺寸和通量放大率测量单个星团质量估计值。利用来自 A901/902 超星系团 HST STAGES（太空望远镜 A901/902 星系演化巡天）调查的数据，我们仅使用放大倍数就检测到了超星系团中具有高显着性的四个已知群体。我们讨论了完全贝叶斯推理分析的应用，并研究了该方法应用中广泛的潜在系统学。我们将我们的结果与之前对同一视场进行的弱透镜剪切分析进行比较，发现仅放大分析的恢复信噪比范围为仅剪切分析中信噪比的 45% 至 110%。根据具体情况，我们发现簇维里半径具有一致的放大率和剪切力约束，并发现对于整个样本，放大率约束比剪切测量值低 0.77 ± 0.18 倍。
We present the first measurement of individual cluster mass estimates using weak lensing size and flux magnification. Using data from the HST STAGES (Space Telescope A901/902 Galaxy Evolution Survey) survey of the A901/902 supercluster we detect the four known groups in the supercluster at high significance using magnification alone. We discuss the application of a fully Bayesian inference analysis, and investigate a broad range of potential systematics in the application of the method. We compare our results to a previous weak lensing shear analysis of the same field finding the recovered signal-to-noise of our magnification-only analysis to range from 45 to 110 per cent of the signal-to-noise in the shear-only analysis. On a case-by-case basis we find consistent magnification and shear constraints on cluster virial radius, and finding that for the full sample, magnification constraints to be a factor 0.77 ± 0.18 lower than the shear measurements.