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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 276901.0, MPI für Astronomie / Publikationen_mpia
Weak Lensing Results from GEMS
Authors:Heymans, Catherine; Brown, Michael L.; Barden, Marco; Caldwell, John A. R.; Jahnke, Knud; Rix, Hans-Walter; Taylor, Andy N.; Beckwith, Steve; Bell, Eric; Borch, Andrea; Häußler, Boris; Jogee, Sharda; McIntosh, Daniel H.; Meisenheimer, Klaus; Peng, Chen; Sánchez, Sebastian F.; Somerville, Rachel; Wisotzki, Lutz; Wolf, Christian
Language:English
Date of Publication (YYYY-MM-DD):2005
Title of Journal:New Astronomy Review
Volume (in Journal):225
Start Page:392
End Page:395
Review Status:not specified
Audience:Not Specified
Abstract / Description:We present our cosmic shear analysis of the Galaxy Evolution from Morphology and SEDs (GEMS) survey. Imaged with the Advanced Camera for Surveys (ACS) on HST, GEMS provides high resolution imaging spanning some 800 square arcmins in the Chandra Deep Field South (CDFS). We discuss the benefits of using space-based data for weak lensing studies and show that the ACS is a very powerful instrument in this regard. We find that we are not limited by systematic errors arising from the anisotropic ACS point spread function distortion and use our cosmic shear results to place joint constraints on the matter density parameter Omegam and the amplitude of the matter power spectrum sigma8, finding sigma8(Omegam/0.3)0.62=0.73 ± 0.12.
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph- bib_query?b... [ID No:1]
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