AI 中文总结
本研究通过分析C IV吸收变异性，确定NGC 5548出流成分1和6的径向距离，为AGN反馈机制提供新的证据。
AI 中文摘要
AGN驱动的出流是中央引擎影响宿主星系演化的关键途径。在出流的物理特性中，其与银河系核区的径向距离对于评估AGN反馈尤为重要。本研究通过分析2013和2014年期间多次哈勃空间望远镜观测获得的光学光谱中C IV吸收凹陷的变异性，研究NGC 5548的紫外出流成分。我们构建了一组基于变异性诊断的事件，标记为G1和G2，这些事件对离子化气体的重组时间尺度（t_r）敏感。通过将这些事件与使用阻尼随机游走（DRW）模型生成的模拟光曲线相结合，我们建立了G1事件概率与t_r之间的映射关系。这种方法使我们能够约束出流成分1和6的径向距离，其吸收变异性主要由入射离子化连续谱的变化驱动，分别为0.77±0.10和1.72±1.74 pc。这些结果与我们先前使用不同方法研究得到的结果一致，并与文献中报告的值相符。
英文摘要
AGN-driven outflows serve as a key channel through which the energetic central engine influences host galaxy evolution. Among the physical properties of outflows, their radial distance from the galactic nucleus is particularly important for assessing AGN feedback. In this study, we investigate the UV outflow components in NGC 5548 by analyzing the variability of C IV absorption troughs in optical spectra obtained through multiple HST observations during 2013 and 2014. We construct a set of variability-based diagnostic events, labeled G1 and G2, which are sensitive to the recombination timescale ($t_r$) of ionized gas. By combining these with mock light curves generated using a damped random walk (DRW) model, we numerically establish a mapping between the G1 event probability and $t_r$. This approach allows us to constrain the radial distances of outflow components 1 and 6, whose absorption variability is primarily driven by changes in the incident ionizing continuum, to be $0.77^{+0.10}_{-0.10}$ and $1.72^{+1.74}_{-1.72}$ pc, respectively. These results are consistent with those obtained using a different method in our previous study, as well as with values reported in the literature.
