Quasar Lensing
Abstract
Massive structures, such as galaxies, act as strong gravitational lenses on background sources. When the background source is a quasar, several lensed images are seen, as magnified or de-magnified versions of the same object. The detailed study of the image configuration and the measurement of ``time-delays'' between the images yield estimates of the Hubble parameter H_0. We describe in a simple way the phenomenon of strong lensing and review recent progress made in the field, including microlensing by stars in the main lensing galaxy.
Cite
@article{arxiv.astro-ph/0208043,
title = {Quasar Lensing},
author = {F. Courbin and P. Saha and P. L. Schechter},
journal= {arXiv preprint arXiv:astro-ph/0208043},
year = {2007}
}
Comments
Review on quasar lensing. Part of a LNP Topical Volume "Dark matter and gravitational lensing" (eds. Courbin, Minniti) to be published by Springer-Verlag, 2002. Paper with full resolution figures at: ftp://ftp.astro.ulg.ac.be/pub/users/courbin/