The Most Metal-rich Damped Lyα Systems at z ≳ 1.5 I: The Data
The Most Metal-rich Damped Lyα Systems at z ≳ 1.5 I: The Data
复制标题
z ≳ 1.5 时最富含金属的阻尼 Lyα 系统 I：数据
DOI：
10.1086/680210
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发表时间：
2014
影响因子：
3.5
通讯作者：
A. Wolfe
中科院分区：
文献类型：
--
作者：
Trystyn A. M. Berg;M. Neeleman;J. Prochaska;S. Ellison;A. Wolfe
我们提供了31个阻尼Lyα系统的HIRES观测结果，这些系统是根据以前较低分辨率数据中的大金属柱密度选择的。为这31个系统提供了Fe、Zn、S、Si、Cr、Mn和Ni的测量金属柱密度。结合以前观测到的大金属柱密度阻尼Lyα系统，我们给出了用高分辨率光谱仪（R = 30，000）观测到的44个阻尼Lyα系统的样本。这些阻尼Lyα系统探测了红移大于1.5的最化学演化的系统。我们讨论了我们的样品与一般阻尼Lyα人口的背景下，证明我们正在探索的前10%的金属柱密度与我们的样品。在配套文件中，我们将提出一个分析样品的元素丰度的背景下，银河系的化学富集。
We present HIRES observations for 31 damped Lyα systems, selected on the basis of their large metal column densities from previous lower-resolution data. The measured metal column densities for Fe, Zn, S, Si, Cr, Mn, and Ni are provided for these 31 systems. Combined with previously observed large metal column density damped Lyα systems, we present a sample of 44 damped Lyα systems observed with high-resolution spectrographs (R ∼ 30,000). These damped Lyα systems probe the most chemically evolved systems at redshifts greater than 1.5. We discuss the context of our sample with the general damped Lyα population, demonstrating that we are probing the top 10% of metal column densities with our sample. In a companion paper, we will present an analysis of the sample’s elemental abundances in the context of galactic chemical enrichment.