The extinction law in high redshift galaxies
Abstract
We estimate the dust extinction laws in two intermediate redshift galaxies. The dust in the lens galaxy of LBQS1009-0252, which has an estimated lens redshift of zl~0.88, appears to be similar to that of the SMC with no significant feature at 2175 A. Only if the lens galaxy is at a redshift of zl~0.3, completely inconsistent with the galaxy colors, luminosity or location on the fundamental plane, can the data be fit with a normal Galactic extinction curve. The dust in the zl=0.68 lens galaxy for B0218+357, whose reddened image lies behind a molecular cloud, requires a very flat ultraviolet extinction curve with (formally) R(V)=12 +- 2. Both lens systems seem to have unusual extinction curves by Galactic standards.
Cite
@article{arxiv.astro-ph/0401548,
title = {The extinction law in high redshift galaxies},
author = {J. A. Munoz and E. E. Falco and C. S. Kochanek and B. A. McLeod and E. Mediavilla},
journal= {arXiv preprint arXiv:astro-ph/0401548},
year = {2009}
}
Comments
15 pages, 3 figures. ApJ in press