• 日期: 2027-01-28
  • 标签: 常规

Several samples of BAL have been observed to exhibit anti-correlations between the fractional variations of the continuum and absorption line, which serves as evidence for ionization driven BAL variation (Lu et al. 2018; Lu & Lin 2018; Vivek 2019). However, these existing studies have not compared the EW variations of BALs at different ionization states with their fractional variations of the continuum.


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