THE COVERING FACTOR OF WARM DUST IN WEAK EMISSION-LINE ACTIVE GALACTIC NUCLEI

被引：1
|
作者：
Zhang, Xudong [1 ,2 ]
Liu, Yuan [2 ]
机构：
[1] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[2] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, POB 918-3, Beijing 100049, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2016年 / 830卷 / 02期
基金：
中国国家自然科学基金;
关键词：
galaxies: active; infrared: galaxies; quasars: emission lines; DIGITAL SKY SURVEY; SPECTRAL ENERGY-DISTRIBUTION; INTRANIGHT OPTICAL VARIABILITY; BL LACERTAE CANDIDATES; PHL; 1811; ANALOGS; X-RAY INSIGHTS; DATA RELEASE; HIGH-REDSHIFT; ACCRETION DISCS; SDSS QUASARS;
D O I：
10.3847/0004-637X/830/2/69
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Weak emission-line active galactic nuclei (WLAGNs) are radio-quiet active galactic nuclei (AGNs) that have nearly featureless optical spectra. We investigate the ultraviolet to mid-infrared spectral energy distributions of 73 WLAGNs (0.4 < z < 3) and find that most of them are similar to normal AGNs. We also calculate the covering factor of warm dust of these 73 WLAGNs. No significant difference is indicated by a KS test between the covering factor of WLAGNs and normal AGNs in the common range of bolometric luminosity. The implication for several models of WLAGNs is discussed. The super-Eddington accretion is unlikely to be the dominant reason for the featureless spectrum of a WLAGN. The present results are still consistent with the evolution scenario, i.e., WLAGNs are in a special stage of AGNs.
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页数：17
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