Composite spectra from the FIRST Bright Quasar Survey

被引：175
|
作者：
Brotherton, MS
Tran, HD
Becker, RH
Gregg, MD
Laurent-Muehleisen, SA
White, RL
机构：
[1] Kitt Peak Natl Observ, Natl Opt Astron Observ, Tucson, AZ 85726 USA
[2] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA
[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
[4] Space Telescope Sci Inst, Baltimore, MD 21218 USA
来源：
ASTROPHYSICAL JOURNAL | 2001年 / 546卷 / 02期
关键词：
quasars : emission lines; quasars : general;
D O I：
10.1086/318309
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a very high signal-to-noise ratio composite spectrum created using 657 radio-selected quasars from the FIRST Bright Quasar Survey. The spectrum spans rest-frame wavelengths 900-7500 Angstrom. Additionally, we present composite spectra formed from subsets of the total data set in order to investigate the spectral dependence on radio loudness and the presence of broad absorption lines. In particular, radio-loud quasars are red compared to radio-quiet quasars, and quasars showing low-ionization broad absorption lines are red compared to other quasars. We compare our composites with those from the Large Bright Quasar Survey. Composite quasar spectra have proved to be valuable tools for a host of applications, and in that spirit we make these publicly available via the FIRST survey web page.
引用
收藏
页码：775 / 781
页数：7
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