A Damped LyA System Along Two Lines of Sight at z=0.93
Probing Galaxies Through QSO Absorption Lines
Proceedings of the IAU Coll. 199 held in Shanghai, China, March 2005
Eds. P. R. Williams, C. Shu, B. Menard
S. Lopez [1], D. Reimers [2], M. Gregg [3], L. Wisotzki [4], O. Wucknitz [5], A. Guzman [1]
- U. de Chile
- U. Hamburg
- UC Davis
- AIP
- U. Potsdam
Abstract
HE 0512-3329 is a gravitationally-lensed double QSO with Damped Ly-alpha systems observed at z=0.931 in front of both QSO images (DLA A and B). We have obtained spatially resolved UV and optical spectra of both QSOs in order to study transverse differences in the metal abundances. We detect substantial differences, of roughly 0.5 dex, in both [Mn/H] and [Fe/H], between lines of sight on a transverse scale of 5 kpc. Differential dust-depletion appears as the most plausible explanation.
You can find the proceedings contribution here. More details are described in our paper on the subjext.
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