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2002MNRAS.333..911H - Mon. Not. R. Astron. Soc., 333, 911-922 (2002/July-2)
HST large-field weak lensing analysis of MS 2053-04: study of the mass distribution and mass-to-light ratio of X-ray luminous clusters at 0.22<z<0.83.
HOEKSTRA H., FRANX M., KUIJKEN K. and VAN DOKKUM P.G.
Abstract (from CDS):
MS 2053 is the third cluster we have studied using mosaics of deep WFPC2 images. For all three clusters we find good agreement between dynamical and weak lensing velocity dispersions, in contrast to weak lensing studies based on single WFPC2 pointings on cluster cores. This result demonstrates the importance of wide-field data. We have compared the ensemble-averaged cluster profile of the clusters in our sample with the predicted Navarro, Frenk & White (NFW) profile, and find that an NFW profile can fit the observed lensing signal well. The best-fitting concentration parameter is found to be 0.79+0.44–0.15 (68 per cent confidence) times the predicted value from an open cold dark matter (CDM) model. The observed mass-to-light ratios of the clusters in our sample evolve with redshift, and are inconsistent with a constant, non-evolving, mass-to-light ratio at the 99 per cent confidence level. The evolution is consistent with the results derived from the evolution of the fundamental plane of early-type galaxies. The resulting average mass-to-light ratio for massive clusters at z =0 is found to be 239±18±9h50M☉/LB☉
Abstract Copyright: 2002 Blackwell Science Ltd
Journal keyword(s): gravitational lensing - galaxies: clusters: individual: MS 2053-04 - galaxies: fundamental parameters - X-rays: galaxies: clusters
Simbad objects: 4
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