6 papers
Strong and weak lensing analysis of cluster Abell 2219 based on optical and near infrared data
J. Bezecourt, H. Hoekstra, M. E. Gray +3
We present a gravitational lensing study of the massive galaxy cluster A2219 (redshift 0.22). This investigation is based on multicolour images from U through H, which allows photo…
Lensed galaxies in Abell 370 II. The ultraviolet properties of arclets and the star formation rate at high redshift
J. Bezecourt, G. Soucail, R. S. Ellis +1
We discuss the statistical properties of faint background galaxies detected in a deep Hubble Space Telescope ultraviolet (F336W) Wide Field Planetary Camera 2 image of the lensing…
Two multiple-imaged z=4.05 galaxies in the cluster-lens Abell 2390
R. Pello, J. -P. Kneib, J. -F. Le Borgne +8
We present the first results on the identification and study of very distant field galaxies in the core of cluster-lenses, using a selection criterium based on both lens modelling…
Arcs statistics as a probe of galaxy evolution
J. Bezecourt
Number counts and redshift distribution of gravitational arcs are computed in the field of massive clusters of galaxies to probe the universe at high redshift. Using an accurate mo…
Number counts and redshift distribution of gravitational arclets as a probe of galaxy evolution
J. Bezecourt, R. Pello, G. Soucail
We present a detailed model of the absolute number counts, color and redshift distributions of gravitational arclets observed in clusters of galaxies. The framework adopted for gal…
Redshift survey of gravitational arclets in Abell 2390
J. Bezecourt, G. Soucail
In this paper, we present new determinations of redshifts on a sample of gravitational arclets identified in the cluster of galaxies Abell 2390. The arclets candidates were selecte…