We present a detailed analysis of the intrinsic UV absorption in the central HDF-S target QSO J2233-606, based on a high-resolution, high-S/N (~25-50) spectrum obtained with VLT UVES. This spectrum samples the cluster of intrinsic absorption systems outflowing from the AGN at radial velocities v ≈ -5000 to -3800 km s-1 in the key far-UV diagnostic lines: the lithium-like CNO doublets and H I Lyman series. We fit the absorption troughs using a global model of all detected lines to solve for the independent velocity-dependent covering factors of the continuum and emission-line sources and ionic column densities. This reveals increasing covering factors in components with greater outflow velocity. Narrow substructure is revealed in the optical depth profiles, suggesting that the relatively broad absorption is comprised of a series of multiple components. We perform velocity-dependent photoionization modeling, which allows a full solution to the C, N, and O abundances, as well as the velocity-resolved ionization parameter and total column density. The absorbers are found to have supersolar abundances, with [C/H] and [O/H] ≈ 0.5-0.9, and [N/H] ≈ 1.1-1.3, consistent with enhanced nitrogen production expected from secondary nucleosynthesis processes. Independent fits to each kinematic component give consistent results for the abundances. The lowest ionization material in each of the strong absorbers is modeled with similar ionization parameters. Components of higher ionization (indicated by stronger O VI relative to C IV and N V) are present at velocities just redward of each low-ionization absorber. We explore the implications of these results for the kinematic-geometric-ionization structure of the outflow.
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机译：我们基于使用VLT UVES获得的高分辨率，高S / N（〜25-50）光谱，对中央HDF-S目标QSO J2233-606中固有的UV吸收进行了详细分析。该光谱对关键的远紫外线诊断线：类锂CNO双重峰和H I Lyman系列中的径向速度v≈-5000至-3800 km s-1从AGN流出的本征吸收系统的簇进行采样。我们使用所有检测到的谱线的全局模型拟合吸收槽，以解决连续谱线和发射谱线源以及离子柱密度的独立于速度的覆盖因子。这揭示了具有更大流出速度的部件中覆盖因子的增加。光学深度分布图中显示出较窄的亚结构，表明相对较宽的吸收由一系列多个成分组成。我们执行与速度有关的光电离建模，该模型可以完全解决C，N和O的丰度以及速度分辨的电离参数和总柱密度的问题。发现吸收剂具有超太阳丰度，[C / H]和[O / H]≈0.5-0.9，[N / H]≈1.1-1.3，这与预期的二次核合成过程中产生的氮增加有关。对每个运动学分量的独立拟合为丰度提供了一致的结果。每个强吸收体中最低的电离材料均采用相似的电离参数进行建模。每个低电离吸收剂的速度刚好向红色方向移动时，会出现较高电离的组分（由相对于C IV和N V较强的O VI表示）。我们探索这些结果对流出物的运动学几何电离结构的影响。
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