论文标题
类星体SDSS j141955.26+522741.1中广泛吸收线变化的检测率急剧上升
A sharp rise in the detection rate of broad absorption line variations in a quasar SDSS J141955.26+522741.1
论文作者
论文摘要
我们介绍了类星体SDSS J141955.26+522741.1 at $ z = 2.145 $中的宽吸收线（BALS）的可变性分析，并从Sloan Digital Sky Survey Data Release 16（SDSS DR16）进行了72个观察结果。 BAL的等效宽度与连续亮度之间的强相关性表明，BAL槽的变化主要由光离子化。光电定化模型预测，当两个观测值之间的时间间隔$ΔT$要比重组时间尺度$ t _ {\ rm rec} $更长时，可以检测到BAL变量。这可以被描述为在$ΔT= t _ {\ rm rec} $的BAL变异检测率中的“急剧上升”。我们第一次在BAL变化的检测率中检测到这种“急剧上升”的签名。结果，我们建议可以从BAL变化的检测率的“急剧上升”中获得$ t _ {\ rm rec} $。值得一提的是，在时间间隔内检测到的BAL变化小于$ t _ {\ rm rec} $的一半数量级的$ t _ {\ rm rec} $。该结果表明可能有多个组件具有不同的$ t _ {\ rm rec} $，但是单个槽中的速度相同。
We present an analysis of the variability of broad absorption lines (BALs) in a quasar SDSS J141955.26+522741.1 at $z=2.145$ with 72 observations from the Sloan Digital Sky Survey Data Release 16 (SDSS DR16). The strong correlation between the equivalent widths of BAL and the continuum luminosity, reveals that the variation of BAL trough is dominated by the photoionization. The photoionization model predicts that when the time interval $ΔT$ between two observations is longer than the recombination timescale $t_{\rm rec}$, the BAL variations can be detected. This can be characterized as a "sharp rise" in the detection rate of BAL variation at $ΔT=t_{\rm rec}$. For the first time, we detect such a "sharp rise" signature in the detection rate of BAL variations. As a result, we propose that the $t_{\rm rec}$ can be obtained from the "sharp rise" of the detection rate of BAL variation. It is worth mentioning that the BAL variations are detected at the time-intervals less than the $t_{\rm rec}$ for half an order of magnitude in two individual troughs. This result indicates that there may be multiple components with different $t_{\rm rec}$ but the same velocity in an individual trough.
