Lensing by Groups of Galaxies
Astrophysics
2007-05-23 v2
Abstract
A large fraction of known galaxy-lens systems require a component of external shear to explain the observed image geometries. In most cases, this shear can be attributed to a nearby group of galaxies. We discuss how the dark-matter mass distribution of groups of galaxies can influence the external shear for strongly lensed sources and Calculate the expected weak lensing signal from groups for various mass profiles.
Cite
@article{arxiv.astro-ph/9909303,
title = {Lensing by Groups of Galaxies},
author = {Ole Moeller and Priyamvada Natarajan},
journal= {arXiv preprint arXiv:astro-ph/9909303},
year = {2007}
}
Comments
2 pages, 2 figures. Poster presentation at "Gravitational Lensing: Recent Progress and Future Goals", Boston University 1999, eds. T.G. Brainerd and C.S. Kochanek