Results from the CASTLES Survey of Gravitational Lenses
Abstract
We show that most gravitational lenses lie on the passively evolving fundamental plane for early-type galaxies. For burst star formation models (1 Gyr of star formation, then quiescence) in low Omega_0 cosmologies, the stellar populations of the lens galaxies must have formed at z_f > 2. Typical lens galaxies contain modest amounts of patchy extinction, with a median differential extinction for the optical (radio) selected lenses of E(B-V) = 0.04 (0.07) mag. The dust can be used to determine both extinction laws and lens redshifts. For example, the z_l=0.96 elliptical lens in MG0414+0534 has an R_V=1.7 +/- 0.1 mean extinction law. Arc and ring images of the quasar and AGN source host galaxies are commonly seen in NICMOS H band observations. The hosts are typically blue, L < L_* galaxies.
Cite
@article{arxiv.astro-ph/9811111,
title = {Results from the CASTLES Survey of Gravitational Lenses},
author = {C. S. Kochanek and E. E. Falco and C. D. Impey and J. Lehar and B. A. McLeod and H. -W. Rix},
journal= {arXiv preprint arXiv:astro-ph/9811111},
year = {2009}
}
Comments
12 pages, 10 figures, from Proceedings of the 9th Annual Astrophysics Conference in Maryland, After the Dark Ages: When Galaxies Were Young