5 papers
Weighting the Clusters of Galaxies with Weak Gravitational Lensing: The problem of the mass-sheet degeneracy
M. Bradac, M. Lombardi, P. Schneider
Weak gravitational lensing is considered to be one of the most powerful tools to study the mass and the mass distribution of galaxy clusters. However, weak lensing mass reconstruct…
Using VLBI Data to Investigate the Galaxy Structure in the Gravitationally Lensed System B1422+231
M. Bradac, P. Schneider, M. Steinmetz +3
Gravitationally lensed systems with multiply imaged quasars are an excellent tool for studying the properties of distant galaxies. In particular, they provide the most accurate mas…
Weak lensing mass reconstruction of MS1008.1-1224
M. Lombardi, P. Rosati, M. Nonino +3
We present an in-depth weak lensing analysis of the cluster MS1008 based on deep multicolor imaging obtained during the Science Verification of FORS1 at the VLT. The image quality…
Weak lensing and cosmology
Marco Lombardi, Giuseppe Bertin
Recently, it has been shown that it is possible to reconstruct the projected mass distribution of a cluster from weak lensing provided that both the geometry of the universe and th…
Improving the accuracy of mass reconstructions from weak lensing: from the shear map to the mass distribution
Marco Lombardi, Giuseppe Bertin
In this paper we provide a statistical analysis of the parameter-free method often used in weak lensing mass reconstructions. It is found that a proper assessment of the errors inv…