Cluster mass estimation from lens magnification
نویسندگان
چکیده
منابع مشابه
Gravitational Lens Magnification and the Mass of Abell
We present the first application of lens magnification to measure the absolute mass of a galaxy cluster; Abell 1689. The absolute mass of a galaxy cluster can be measured by the gravitational lens magnification of a background galaxy population by the cluster gravitational potential. The lensing signal is complicated by the intrinsic variation in number counts due to galaxy clustering and shot–...
متن کاملar X iv : a st ro - p h / 97 11 17 8 v 1 1 6 N ov 1 99 7 Cluster mass estimation from lens magnification
The mass of a cluster of galaxies can be estimated from its lens magnification, which can be determined from the variation in number counts of background galaxies. In order to derive the mass one needs to make assumptions for the lens shear, which is unknown from the variation in number counts alone. Furthermore, one needs to go beyond the weak lensing (linear) approximation as most of the obse...
متن کاملCluster mass profiles from weak lensing: constraints from shear and magnification information
A massive foreground cluster lens changes the shapes (shear effect) and number density (magnification effect) of the faint background galaxy population. In this paper we investigate how the shear, magnification and combined information can be used to constrain cluster mass profiles in the weak lensing regime. We develop maximum likelihood techniques to make quantitative predictions for each of ...
متن کاملA Magnification Lens for Interactive Volume Visualization
Volume visualization of large data sets suffers from the same problem that many other visualization modalities suffer from: either one can visualize the entire data set and loose small details or visualize a small region and loose the context. In this paper, we present a magnification lens technique for volume visualization. While the notion of a magnification-lens is not new, and other techniq...
متن کاملJu l 1 99 9 Cluster mass profiles fromweak lensing : shear vs . magnification information
A massive foreground cluster lens changes the shapes (shear effect) and number density (magnification effect) of the faint background galaxy population. In this paper we investigate how the shear, magnification and combined information can be used to constrain cluster mass profiles in the weak lensing regime. We develop maximum likelihood techniques to make quantitative predictions for each of ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1998
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.1998.01997.x