Properties of radio-selected broad absorption line quasars from the first Bright Quasar Survey

被引：242
作者：
Becker, RH [1 ]
White, RL
Gregg, MD
Brotherton, MS
Laurent-Muehleisen, SA
Arav, N
机构：
[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
[2] Univ Calif Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA
[3] Space Telescope Sci Inst, Baltimore, MD 21218 USA
来源：
ASTROPHYSICAL JOURNAL | 2000年 / 538卷 / 01期
关键词：
quasars : absorption lines; quasars : general; radio continuum : general; surveys;
D O I：
10.1086/309099
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In a spectroscopic follow-up to the VLA FIRST survey, the FIRST Bright Quasar Survey (FBQS) has found 29 radio-selected broad absorption line (BAL) quasars. This sample provides the first opportunity to study the properties of radio-selected BAL quasars. Contrary to most previous studies, we establish that a significant population of radio-loud BAL quasars exists. Radio-selected BAL quasars display compact radio morphologies and possess both steep and flat radio spectra. Quasars with low-ionization BALs have a color distribution redder than that of the FBQS sample as a whole. The frequency of BAL quasars in the FBQS is significantly greater, perhaps by as much as a factor of 2, than that inferred from optically selected samples. The frequency of BAL quasars appears to have a complex dependence on radio loudness. The properties of this sample appear to be inconsistent with simple unified models in which BAL quasars constitute a subset of quasars seen edge-on.
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收藏
页码：72 / 82
页数：11
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