Probing spectral properties of radio-quiet quasars searched for optical microvariability

被引：9
|
作者：
Chand, Hum [1 ]
Wiita, Paul J. [2 ,3 ]
Gupta, Alok C. [1 ]
机构：
[1] Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263129, India
[2] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30302 USA
[3] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2010年 / 402卷 / 02期
关键词：
galaxies: active; quasars: emission lines; quasars: general; BLACK-HOLE MASSES; EMISSION-LINE PROPERTIES; ACTIVE GALACTIC NUCLEI; HOST-GALAXY STARLIGHT; LUMINOSITY RELATIONSHIP; REDSHIFT QUASARS; VARIABILITY; SAMPLE; MODELS; WIDTH;
D O I：
10.1111/j.1365-2966.2009.15943.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We obtained Sloan Digital Sky Survey spectra for a set of 37 radio-quiet quasars [(radio-quiet quasi-stellar objects (RQQSOs)] that had been previously examined for rapid small-scale optical variations, or microvariability. Their H beta and Mg II emission lines were carefully fit to determine linewidths (full width at half-maximum) as well as equivalent widths (EW) due to the broad emission-line components. The linewidths were used to estimate black hole masses and Eddington ratios, l. Both EWand FWHM are anticorrelated with l. The EW distributions provide no evidence for the hypothesis that a weak jet component in the RQQSOs is responsible for their microvariability.
引用
收藏
页码：1059 / 1071
页数：13
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