Vanishing absorption and blueshifted emission in FeLoBAL quasars

被引：16

作者：

Rafiee, Alireza ^{[1
]}

Pirkola, Patrik ^{[1
]}

Hall, Patrick B. ^{[1
]}

Galati, Natalee ^{[1
]}

Rogerson, Jesse ^{[1
]}

Ameri, Abtin ^{[1
,2
]}

机构：

[1] York Univ, Dept Phys & Astron, 4700 Keele St, Toronto, ON M3J 1P3, Canada

[2] Bloor Collegiate Inst, 1141 Bloor St West, Toronto, ON M6H 1M9, Canada

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 459卷 / 03期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会; 美国安德鲁·梅隆基金会;

关键词：

quasars: absorption lines; DIGITAL SKY SURVEY; AGN FEEDBACK; ACCRETION DISK; OUTFLOW CONTRIBUTION; LINE VARIABILITY; CATALOG; II;

D O I：

10.1093/mnras/stw634

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the dramatic decrease in iron absorption strength in the iron low-ionization broad absorption line quasar SDSS J084133.15+200525.8. We report on the continued weakening of absorption in the prototype of this class of variable broad absorption line quasar, FBQS J140806.2+305448. We also report a third example of this class, SDSS J123103.70+392903.6; unlike the other two examples, it has undergone an increase in observed continuum brightness (at 3000 angstrom rest frame) as well as a decrease in iron absorption strength. These changes could be caused by absorber transverse motion or by ionization variability. We note that the MgII and UV Fe II lines in several FeLoBAL quasars are blueshifted by thousands of km s(-1) relative to the H beta emission line peak. We suggest that such emission arises in the outflowing winds normally seen only in absorption.

引用

页码：2472 / 2485

页数：14

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