7.7k citations · 33.9k across the 206 of their papers we have counts for
9 papers · 2 filters
Optical/Infrared Survey of Galaxy Clusters
Luiz da Costa, S. Arnouts, S. Bardelli +13
In this contribution the ongoing effort to build a statistical sample of clusters of galaxies over a wide range of redshifts to study the evolution of clusters and member galaxies…
Terapixel Surveys for Cosmic Shear
Y. Mellier, L. van Waerbeke, M. Radovich +14
The recent detections of cosmic shear signal announced by several groups have demonstrated the feasibility of this challenging program and convinced astro- nomers of its potential…
Cosmic Shear Analysis in 50 Uncorrelated VLT Fields. Implications for Omega_0, sigma_8
R. Maoli, L. Van Waerbeke, Y. Mellier +5
We observed with the camera FORS1 on the VLT (UT1, ANTU) 50 randomly selected fields and analyzed the cosmic shear inside circular apertures with diameter ranging from 0.5 to 5.0 a…
Cosmic Shear and Clusters of Galaxies
Y. Mellier, L. van Waerbeke, T. Erben +9
The first detections of cosmic shear signal reported recently by 4 independent groups cover angular scales between one and 10 arcmin. On those scales, the cosmic shear is a signatu…
A Numerical Study of Cosmic Shear Statistics
A. Thion, Y. Mellier, F. Bernardeau +3
We explore the stability of the variance and skewness of the cosmic gravitational convergence field, using two different approaches: first we simulate a whole MEGACAM survey (100 s…
Cosmic Shear with the VLT
R. Maoli, Y. Mellier, L. van Waerbeke +5
We report on the detection of cosmic shear on angular scales of 1.3-6.5 arcmin using 45 independent empty fields observed with the Very Large Telescope (VLT). This result confirms…
Cosmic Shear with the CFHT
L. van Waerbeke, Y. Mellier, T. Erben +10
We present results of our cosmic shear survey in progress at the Canada- France-Hawaii Telescope (CFHT). We analysed 1.7 sq. degrees of data, out of which we measured a significant…
How accurately can we measure weak gravitational shear?
Thomas Erben, Ludovick Van Waerbeke, Emmanuel Bertin +2
With the recent detection of cosmic shear, the most challenging effect of weak gravitational lensing has been observed. The main difficulties for this detection were the need for a…
Detection of correlated galaxy ellipticities on CFHT data: first evidence for gravitational lensing by large-scale structures
L. Van Waerbeke, Y. Mellier, T. Erben +10
We report the detection of a significant (5.5 sigma) excess of correlations between galaxy ellipticities at scales ranging from 0.5 to 3.5 arc-minutes. This detection of a gravitat…