C-IV宽吸收线特性对伴随Si-IV和Al-III吸收的依赖性：类星体风电离能级、动能和柱密度的关系
The Dependence of C IV Broad Absorption Line Properties on Accompanying Si IV and Al III Absorption: Relating Quasar-Wind Ionization Levels, Kinematics, and Column Densities
摘要：
我们考虑如何配置文件和多年的变化特性的一个大样本的C IV宽吸收线（BAL）槽的变化时，BALs从Si IV和/或Al III是存在于相应的速度，表明视线拦截至少一些较低的电离气体。我们得出了一些观测结果C IV BALs分离根据存在或不存在的伴随较低的电离跃迁，包括测量复合剖面形状，等效宽度（EW），特征速度，复合变化剖面，和EW的变异性。我们还测量了EW和分数EW变异C IV，Si IV和Al III之间的相关性。我们的测量揭示了在吸积盘风模型中预期的电离水平、运动学和柱密度之间的基本相关变化;例如，包括较低电离物质的视线通常显示出较深和较宽的CIV槽，其具有较小的最小速度并且变化较小。许多不含Si IV或Al III BAL的C IV BAL可能仅具有轻度饱和或不具有饱和。
英文摘要：
We consider how the profile and multi-year variability properties of a large sample of C IV Broad Absorption Line (BAL) troughs change when BALs from Si IV and/or Al III are present at corresponding velocities, indicating that the line-of-sight intercepts at least some lower ionization gas. We derive a number of observational results for C IV BALs separated according to the presence or absence of accompanying lower ionization transitions, including measurements of composite profile shapes, equivalent width (EW), characteristic velocities, composite variation profiles, and EW variability. We also measure the correlations between EW and fractional-EW variability for C IV, Si IV, and Al III. Our measurements reveal the basic correlated changes between ionization level, kinematics, and column density expected in accretion-disk wind models; e.g., lines-of-sight including lower ionization material generally show deeper and broader C IV troughs that have smaller minimum velocities and that are less variable. Many C IV BALs with no accompanying Si IV or Al III BALs may have only mild or no saturation.
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