The Eddington ratios in Seyfert 2 galaxies with and without hidden broad-line regions
Bian WH(卞维豪); Bian, W; Gu, Q
刊名ASTROPHYSICAL JOURNAL
2007
卷号657期号:1页码:#REF!
关键词galaxies : active galaxies : Seyfert polarization
学科分类Astronomy & Astrophysics
DOI10.1086/510708
通讯作者Bian, W (reprint author), Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing, Peoples R China.
文章类型Article
英文摘要Using a large sample of 90 Seyfert 2 galaxies (Sy2s) with spectropolarimetric observations, we test the suggestion that the presence of hidden broad-line regions (HBLRs) in Sy2s depends upon the Eddington ratio. The stellar velocity dispersion and extinction-corrected [O III] luminosity are used to derive the masses of central supermassive black holes and the Eddington ratio. We find that (1) below an Eddington ratio threshold of 10(-1.37), all of the objects but one are non-HBLR Sy2s, while at higher Eddington ratios there is no obvious distinction in the Eddington ratio and black hole mass distributions between Sy2s with and without HBLRs; (2) almost no low-luminosity Sy2s (e.g., L vertical bar O III vertical bar < 10(41) ergs s(-1)) show HBLRs, regardless of the column density of neutral hydrogen; (3) for high luminosities, the possibility of detecting HBLR Sy2s is almost the same as that for non-HBLR Sy2s; and (4) when considering only Compton-thin Sy2s with higher [O III] luminosity (> 10(41) ergs s(-1)), the detectability of HBLRs is very high, similar to 85%. These results suggest that AGN luminosity plays a major role in the failure to detect HBLRs in low-luminosity Sy2s, while for high-luminosity Sy2s the detectability of HBLRs depends not only upon the AGN activity, but also upon the torus obscuration.
类目[WOS]Astronomy & Astrophysics
收录类别SCI
WOS记录号WOS:000244635300014
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被引频次:50[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226581
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
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Bian WH,Bian, W,Gu, Q. The Eddington ratios in Seyfert 2 galaxies with and without hidden broad-line regions[J]. ASTROPHYSICAL JOURNAL,2007,657(1):#REF!.
APA 卞维豪,Bian, W,&Gu, Q.(2007).The Eddington ratios in Seyfert 2 galaxies with and without hidden broad-line regions.ASTROPHYSICAL JOURNAL,657(1),#REF!.
MLA 卞维豪,et al."The Eddington ratios in Seyfert 2 galaxies with and without hidden broad-line regions".ASTROPHYSICAL JOURNAL 657.1(2007):#REF!.
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