首页|Relations between the Fractional Variation of the Ionizing Continuum and CⅣ Broad Absorption Lines with Different Ionization Levels

Relations between the Fractional Variation of the Ionizing Continuum and CⅣ Broad Absorption Lines with Different Ionization Levels

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This paper explores the correlation between the fractional variation of the ionizing continuum and CⅣ broad absorption lines(BALs)with different ionization levels.Our results reveal anti-correlations between fractional variation of the continuum and fractional equivalency width(EW)variation of the CⅣ BALs without Al m BAL/mini-BALs at corresponding velocities,providing evidence for the widespread influence of the ionizing continuum variability on the variation of HiBALs.Conversely,for CⅣ BALs accompanied by Alm BAL/mini-BALs(LoBAL groups),no significant correction is detected.The absence of such a correlation does not rule out the possibility that variations in these low-ionization lines are caused by ionizing continuum variability,but rather suggests the influence of BAL saturation to some extent.This saturation effect is reflected in the distribution of the fractional EW variation,where the CⅣ BAL group accompanied by Al m BAL has a smaller standard deviation for the best-fitting Gaussian component than the two BAL groups without Al Ⅲ BAL.However,the distribution of fractional variation of their continuum does not show any significant difference.Besides the saturation influence,another potential explanation for the lack of correlations in the LoBAL groups may be the effects of other variability mechanisms besides the ionization change,such as clouds transiting across the line of sight.

(galaxies:)quasars:absorption lines(galaxies:)quasars:generalgalaxies:active

Ying-Ru Lin、Cai-Juan Pan、Wei-Jian Lu

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School of Information Engineering,Baise University,Baise 533000,China

School of Materials Science and Engineering,Baise University,Baise 533000,China

广西自然科学基金国家自然科学基金Research Project of Baise UniversityAlfred P.Sloan FoundationU.S.Department of Energy Office of ScienceParticipating InstitutionsCenter for High-Performance Computing at the University of Utah

2021GXNSFBA220044119030022019KN04

2024

10.1088/1674-4527/ad057c

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2024.24(2)
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