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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 276792.0, MPI für Astronomie / Publikationen_mpia
Cosmological weak lensing with the HST GEMS survey
Authors:Heymans, Catherine; Brown, Michael L.; Barden, Marco; Caldwell, John A. R.; Jahnke, Knud; Peng, Chien Y.; Rix, Hans-Walter; Taylor, Andy; Beckwith, Steven V. W.; Bell, Eric F.; Borch, Andrea; Häußler, Boris; Jogee, Shardha; McIntosh, Daniel H.; Meisenheimer, Klaus; Sánchez, Sebastian F.; Somerville, Rachel; Wisotzki, Lutz; Wolf, Christian
Date of Publication (YYYY-MM-DD):2005
Title of Journal:Monthly Notices of the Royal Astronomical Society
Journal Abbrev.:Monthly Notices of the Royal Astronomical Society
Start Page:160
End Page:176
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present our cosmic shear analysis of GEMS, one of the largest wide-field surveys ever undertaken by the Hubble Space Telescope. Imaged with the Advanced Camera for Surveys (ACS), GEMS spans 795 arcmin2 in the Chandra Deep Field South. We detect weak lensing by large-scale structure in high-resolution F606W GEMS data from ~60 resolved galaxies per square arcminute. We measure the two-point shear correlation function, the top-hat shear variance and the shear power spectrum, performing an E/B mode decomposition for each statistic. We show that we are not limited by systematic errors and use our results to place joint constraints on the matter density parameter Omegam and the amplitude of the matter power spectrum sigma8. We find sigma8(Omegam/0.3)0.65= 0.68 +/- 0.13 where the 1sigma error includes both our uncertainty on the median redshift of the survey and sampling variance.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL: bib_query?b... [ID No:1]
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