类星体SDSS J024304.68+000005.4光谱Mini-BAL光变分析

Light Variation Analysis of Mini-BAL in the SDSS J024304.68+000005.4 Spectrum

类星体J024304.68+000005.4在观测坐标系4542 Å~4598 Å出现一个mini-BAL,可以被5个高斯很好地拟合,其中包含一对内禀的CIVλλ1548,1551窄吸收线。CIV吸收体红移为1.942,与发射体的相对速度大小为6750 km/s。在3629个MJD内,mini-BAL等值宽度的变化趋势与其中的CIVλλ1548,1551窄线的等值宽度的变化趋势一致。对mini-BAL内5个窄高斯进行分析,发现等值宽度最小值越大的高斯成分,其光变幅度就越大。本文的研究结果可为mini-BAL起源和外流吸收线的变化原因的研究工作提供有益的数据参考。

We found a mini-BAL between 4542 Å- 4598 Å(in the observation frame) in the spectra of Quasar J024304.68+000005.4. This mini-BAL can be fitted very well using five Gaussian functions, which contains a pair of intrinsic CIVλλ1548,1551 narrow absorption doubles. The CIV absorbing material is at a red-shift of 1.942, and its relative velocity is 6750 km/s. In the timescale of 3629 MJD, the variation trends of the equivalent width of this mini-BAL are accordant with the CIVλλ1548,1551 narrow lines. For the five narrow Gaussian of the mini-BAL, we found that the smaller is the minimum of equivalent width of the Gaussian component, the greater is its variability amplitude. Our results provide useful data for the study of the origins of mini-BAL and of outflow absorption lines.