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2004MNRAS.353.1176T - Mon. Not. R. Astron. Soc., 353, 1176-1196 (2004/October-1)
Mapping the 3D dark matter with weak lensing in COMBO-17.
TAYLOR A.N., BACON D.J., GRAY M.E., WOLF C., MEISENHEIMER K., DYE S., BORCH A., KLEINHEINRICH M., KOVACS Z. and WISOTZKI L.
Abstract (from CDS):
We then present the first 3D map of the dark-matter gravitational potential field, Φ, from weak lensing using the Kaiser-Squires and Taylor inversion methods. These maps clearly show the potential wells of the main supercluster components, including the new cluster behind A902, and demonstrate the applicability of 3D dark-matter mapping and projection-free, mass-selected cluster finding to current data. Finally, we develop the halo model of dark matter and galaxy clustering and compare this with the auto- and cross-correlation functions of the 3D gravitational potential, galaxy number densities and galaxy luminosity densities measured in the A901/2 field. We find significant anticorrelations between the gravitational potential field and the galaxy number density and luminosities, as expected due to baryonic infall into dark-matter concentrations. We find good agreement with the halo model for the number densities and luminosity correlation functions, but some disagreement with the shape of the gravitational potential correlation function, which we attribute to finite-field effects.
Abstract Copyright: 2004 RAS
Journal keyword(s): gravitation - gravitational lensing - cosmology: observations - dark matter - large-scale structure of Universe
Simbad objects: 5
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