Heavy Elements in the Lyman-$α$\ Forest: Abundances and Clustering at z=3

Details Heavy Elements in the Lyman-$α$\ Forest: Abundances and Clustering at z=3 Heavy Elements in the Lyman-$α$\ Forest: Abundances and Clustering at z=3

1995-11-09

arxiv.org/abs/astro-ph/9511035v1

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, full-sized figures and paper also available at ftp://astro.caltech.edu/users/dsw/ as xxx_fig1.ps, xxx_fig2

Scientific paper

For the purpose of studying the properties of heavy-elements associated with the Lyman-$\alpha$\ forest, we observed the gravitational lens Q1422+2309. We used the HIRES instrument on the W.M. Keck telescope to obtain a high-resolution, very high signal-to-noise spectrum of this z=3.63 quasar; the spectrum covers wavelengths from below Lyman-$\beta$\ up to the C IV emission line. Consistent with previous estimates, we find that a moderate fraction of the Ly-$\alpha$\ forest clouds have been enriched with heavy elements at a level significantly below solar abundance. However, unlike the fairly uniform distribution of Ly-$\alpha$\ forest lines, we show that the C IV absorption lines are clustered on large velocity scales.

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