The dark matter environment of the Abell 901/902 supercluster: a weak lensing analysis of the HST STAGES survey

The dark matter environment of the Abell 901/902 supercluster: a weak lensing analysis of the HST STAGES survey
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Abell 901/902 超星系团的暗物质环境:HST STAGES 巡天的弱透镜分析

DOI:
10.1111/j.1365-2966.2008.12919.x
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发表时间:
2008-01
影响因子:
4.8
通讯作者:
Gray Me
Gray Me
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Häußler Boris;Sanchez Sebastian F.;van Waerbeke Ludovic;Meillier Yannick;Wisotzki Lutz;Peng Chien Y.;Lane Kyle;Barazza Fabio D.;Taylor Andy N.;Heymans Catherine;Zheng Xianzhong;van Kampen Eelco;Böhm Asmus;Jahnke Knud;McIntosh Daniel H.;Gray Me

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我们提出了一个高分辨率的暗物质重建的z = 0.165阿贝尔901/902超星系团的弱透镜分析的哈勃太空望远镜阶段调查。我们检测的超星系团的四个主要结构在高的意义,解决内部和集群之间的子结构。我们发现暗物质的分布很好地跟踪了星系团星系,最明亮的星系团标记出暗物质分布的最强峰。我们还发现了阿贝尔901 a的暗物质分布在下落的X射线群阿贝尔901 α的方向上的显著延伸。我们目前的质量,质量光和质量恒星质量比测量的结构和子结构,我们检测。我们没有发现不同星系团之间质量与光和质量与恒星质量比变化的证据。我们比较我们的天基透镜分析与早期的地基透镜分析的超星系团,以证明未来弱透镜暗物质的观测天基成像的重要性。
We present a high-resolution dark matter reconstruction of the z = 0.165 Abell 901/902 supercluster from a weak lensing analysis of the Hubble Space Telescope STAGES survey. We detect the four main structures of the supercluster at high significance, resolving substructure within and between the clusters. We find that the distribution of dark matter is well traced by the cluster galaxies, with the brightest cluster galaxies marking out the strongest peaks in the dark matter distribution. We also find a significant extension of the dark matter distribution of Abell 901a in the direction of an infalling X-ray group Abell 901 alpha. We present mass, mass-to-light and mass-to-stellar mass ratio measurements of the structures and substructures that we detect. We find no evidence for variation of the mass-to-light and mass-to-stellar mass ratio between the different clusters. We compare our space-based lensing analysis with an earlier ground-based lensing analysis of the supercluster to demonstrate the importance of space-based imaging for future weak lensing dark matter 'observations'.
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