SIMBAD references

2005MNRAS.363..723B - Mon. Not. R. Astron. Soc., 363, 723-733 (2005/November-1)

Evolution of the dark matter distribution with three-dimensional weak lensing.

BACON D.J., TAYLOR A.N., BROWN M.L., GRAY M.E., WOLF C., MEISENHEIMER K., DYE S., WISOTZKI L., BORCH A. and KLEINHEINRICH M.

Abstract (from CDS):

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 0.5x0.5 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 4.7σ 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 σ8and ΩΛ. We find joint constraints on ΩΛand σ8, demonstrating an improvement in accuracy by ≃40 per cent over that available from 2D weak lensing for the same area.

Abstract Copyright: 2005 RAS

Journal keyword(s): gravitational lensing - cosmological parameters - dark matter - large-scale structure of Universe

Status at CDS:  

CDS comments: Field S11 not identified.

Simbad objects: 4

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2020.04.07-19:15:33

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