Metal-rich Damped/sub-Damped Lyman-alpha Quasar Absorbers at z<1

Details Metal-rich Damped/sub-Damped Lyman-alpha Quasar Absorbers at z<1 Metal-rich Damped/sub-Damped Lyman-alpha Quasar Absorbers at z<1

2006-07-25

arxiv.org/abs/astro-ph/0607561v1

Mon.Not.Roy.Astron.Soc.372:369-380,2006

Astronomy and Astrophysics

Astrophysics

13 pages, 8 figures. Accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2006.10865.x

Damped Lyman-alpha absorbers (DLAs), seen in absorption against a background quasar, provide the most detailed probes available of element abundances in the Universe over > 90 % of its age. DLAs can be used to observationally measure the global mean metallicity in the Universe and its evolution with time. Paradoxically, these observations are more difficult at lower redshifts, where the absorber rest-frame UV spectra are cut-off due to the atmospheric absorption. We present here high-resolution VLT/UVES observations of several elements contained in three DLAs and one sub-DLA with 0.6

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