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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 421636.0, MPI für Astronomie / Publikationen_mpia
The dark matter environment of the Abell 901/902 supercluster: a weak lensing analysis of the HST STAGES survey
Authors:Heymans, Catherine; Gray, Meghan E.; Peng, Chien Y.; van Waerbeke, Ludovic; Bell, Eric F.; Wolf, Christian; Bacon, David; Balogh, Michael; Barazza, Fabio D.; Barden, Marco; Böhm, Asmus; Caldwell, John A. R.; Häußler, Boris; Jahnke, Knud; Jogee, Shardha; van Kampen, Eelco; Lane, Kyle; McIntosh, Daniel H.; Meisenheimer, Klaus; Mellier, Yannick; Sánchez, Sebastian F.; Taylor, Andy N.; Wisotzki, Lutz; Zheng, Xianzhong
Language:English
Date of Publication (YYYY-MM-DD):2008
Title of Journal:Monthly Notices of the Royal Astronomical Society
Volume:385
Start Page:1431
End Page:1442
Review Status:Peer-review
Audience:Experts Only
Abstract / Description: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 901alpha. 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'.
Free Keywords:galaxies: cluster; cosmology: observations; dark matter; large-scale structure of Universe
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008MNRAS.385.1431H [ID No:1]
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