The 400d Galaxy Cluster Survey weak lensing programme
نویسندگان
چکیده
منابع مشابه
Weak Lensing Mass Reconstruction of the Galaxy Cluster Abell 209 ⋆
Context. Weak lensing applied to deep optical images of clusters of galaxies provides a powerful tool to reconstruct the distribution of the gravitating mass associated to these structures. Aims. We use the shear signal extracted by an analysis of deep exposures of a region centered around the galaxy cluster ABCG209, at redshift z ∼ 0.2, to derive both a map of the projected mass distribution a...
متن کاملWeak lensing survey of galaxy clusters in the CFHTLS Deep
Aims. We present a weak lensing search of galaxy clusters in the 4 deg2 of the CFHT Legacy Survey Deep. This work aims at building a mass-selected sample of clusters with well controlled selection effects. This present survey is a preliminary step toward a full implementation in the forthcoming 170 deg2 of the CFHTLS Wide survey. Methods. We use the deep i band images observed under subarcsecon...
متن کاملPhysical component analysis of galaxy cluster weak gravitational lensing data
We present a novel approach for reconstructing the projected mass distribution of clusters of galaxies from sparse and noisy weak gravitational lensing shear data. The reconstructions are regularised using knowledge gained from numerical simulations of clusters: trial mass distributions are constructed from n physically-motivated components, each of which has the universal density profile and c...
متن کاملDiscovery of a Galaxy Cluster via Weak Lensing
We report the discovery of a cluster of galaxies via its weak gravitational lensing effect on background galaxies, the first spectroscopically confirmed cluster to be discovered through its gravitational effects rather than by its electromagnetic radiation. We have confirmed this cluster with spectroscopic redshifts of fifteen members at z=0.276, with a velocity dispersion of 615 km s. This fun...
متن کاملFirst weak lensing results from the Red-Sequence Cluster Survey
The Red-Sequence Cluster Survey (RCS) is a 100 deg galaxy cluster survey designed to provide a large sample of optically selected clusters of galaxies with redshifts 0.1 < z < 1.4. The survey data are also useful for a variety of lensing studies. Several strong lensing clusters have been discovered so far, and follow up observations are underway. In these proceedings we present some of the firs...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2012
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201118676