Deceleration of CIV and Si IV Broad Absorption Lines in X-Ray Bright Quasar SDSS-J092345+512710

被引：15
作者：
Joshi, Ravi [1 ]
Srianand, Raghunathan [2 ]
Chand, Hum [3 ]
Wu, Xue-Bing [1 ,4 ]
Noterdaeme, Pasquier [5 ]
Petitjean, Patrick [5 ]
Ho, Luis C. [1 ,4 ]
机构：
[1] Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
[2] Interuniv Ctr Astron & Astrophys, Post Bag 4, Pune 411007, Maharashtra, India
[3] Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263002, India
[4] Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
[5] CNRS SU, UMR 7095, Inst Astrophys Paris, 98Bis Bd Arago, F-75014 Paris, France
来源：
ASTROPHYSICAL JOURNAL | 2019年 / 871卷 / 01期
基金：
美国安德鲁·梅隆基金会; 美国国家科学基金会; 国家重点研发计划;
关键词：
galaxies: active; quasars: absorption lines; quasars: general; quasars: individual (J092345+512710); SUPERMASSIVE BLACK-HOLES; DRIVEN DISK WINDS; TIME VARIABILITY; OUTFLOWS; VELOCITY; ACCELERATION; SPECTROSCOPY; CONFINEMENT; DYNAMICS; CATALOG;
D O I：
10.3847/1538-4357/aaf500
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report a synchronized kinematic shift of C IV. and Si IV. broad absorption lines ( BAL) in a high-ionization, radio-loud, and X-ray bright quasar SDSS-J092345+512710 ( at z(em) similar to 2.1627). This quasar shows two broad absorption components (blue component at nu similar to 14,000 km s(-1), and red component at nu similar to 4000 km s(-1) with respect to the quasars systemic redshift). The absorption profiles of C IV. and Si IV. BAL of the blue component show a decrease in outflow velocity with an average deceleration rate of 1.62(-0.05)(-0.0) cm s(-2) and 1.14(-0.22)(+0.24) cm s(-2) over a rest-frame time span of 4.15 yr. We do not see any acceleration-like signature in the red component. This is consistent with dramatic variabilities usually seen at high velocities. During our monitoring period the quasar has shown no strong continuum variability. We suggest the observed variability could be related to the time dependent changes in disk wind parameters like launching radius, initial flow velocity, or mass outflow rate.
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页数：7
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