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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 276878.0, MPI für Astronomie / Publikationen_mpia
Evolution of the dark matter distribution with three-dimensional weak lensing
Authors:Bacon, D. J.; Taylor, A. N.; Brown, M. L.; Gray, M. E.; Wolf, C.; Meisenheimer, K.; Dye, S.; Wisotzki, L.; Borch, A.; Kleinheinrich, M.
Language:English
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
Volume:363
Start Page:723
End Page:733
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present a direct detection of the growth of large-scale structure, using weak gravitational lensing and photometric redshift data from the COMBO-17 survey. We use deep R-band imaging of two 0.5 _ 0.5 deg2 fields, affording shear estimates for over 52000 galaxies; we combine these with photometric redshift estimates from our 17-band survey, in order to obtain a 3D shear field. We find theoretical models for evolving matter power spectra and correlation functions, and fit the corresponding shear correlation functions to the data as a function of redshift. We detect the evolution of the power at the 4.7sigma level given reasonable priors, and measure the rate of evolution for 0 < z < 1. We also fit correlation functions to our 3D data as a function of cosmological parameters sigma8 and OmegaLambda. We find joint constraints on OmegaLambda and sigma8, demonstrating an improvement in accuracy by ~=40 per cent over that available from 2D weak lensing for the same area.
External Publication Status:published
Document Type:Article
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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