Correlation between the variation of the ionizing continuum and broad absorption lines
Correlation between the variation of the ionizing continuum and broad absorption lines
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DOI：
10.1093/mnrasl/slx176
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发表时间：
2017-11
影响因子：
4.8
通讯作者：
Wei-Jian Lu;Ying-Ru Lin;Y. Qin
中科院分区：
文献类型：
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作者：
Wei-Jian Lu;Ying-Ru Lin;Y. Qin
在这封信中，我们提出了一个宽吸收线（巴尔斯）和连续的可变性之间的关系的分析。我们的样本是斯隆数字巡天I/II/III（SDSS-I/II/III）对483个类星体的多历元观测。我们推导出的分数通量变化的连续和分数等效宽度（EW）的变化为C IV和Si IV巴尔斯，并探讨三者之间的相关性。我们的研究结果揭示了中等的CIV和Si IV巴尔斯的连续分数通量变化和分数EW变化之间的高显着性水平的EFT关系。我们还证明了C IV和Si IV巴尔斯的分数EW变化之间的显着正相关性，这与以前的几项研究一致。我们的发现可以作为证据的想法：电离连续体的变化是BAL变异性的主要驱动力。
In this Letter, we present an analysis of the relation between the variability of broad absorption lines (BALs) and that of the continuum. Our sample is multi-epoch observations of 483 quasars by the Sloan Digital Sky Survey-I/II/III (SDSS-I/II/III). We derive the fractional flux variations of the continuum and fractional equivalent width (EW) variations for C IV and Si IV BALs, and explore the correlations between the three. Our results reveal moderate anticorrelations with high significance level between the fractional flux variations of the continuum and fractional EW variations for both C IV and Si IV BALs. We also prove a significant positive correlation between the fractional EW variations for C IV and Si IV BALs, which is in agreement with several previous studies. Our discoveries can serve as evidence for the idea: Change of an ionizing continuum is the primary driver of BAL variability.