Stellar and gaseous velocity dispersions in type II AGNs at 0.3 < z < 0.83 from the Sloan Digital Sky Survey
Bian WH(卞维豪); Bian, W; Gu, Q; Zhao, Y; Chao, L; Cui, Q
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2006
卷号372期号:2页码:876-884
关键词galaxies : active galaxies : nuclei quasars : emission lines
学科分类Astronomy & Astrophysics
DOI10.1111/j.1365-2966.2006.10915.x
通讯作者Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China ; Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210097, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100039, Peoples R China ; Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
文章类型Article
英文摘要We apply the stellar population synthesis code by Cid Fernandes et al. to model the stellar contribution for a sample of 209 type II active galactic nuclei (AGNs) at 0.3 < z < 0.83 from the Sloan Digital Sky Survey. The reliable stellar velocity dispersions (sigma(*)) are obtained for 33 type II AGNs with significant stellar absorption features. According to the L-[O III] criterion of 3 x 10(8) L-circle dot, 20 of which can be classified as type II quasars. We use the formula of Greene and Ho to obtain the corrected stellar velocity dispersions (sigma(c)(*)). We also calculate the supermassive black hole masses from sigma(c)(*) in these high-redshift type II AGNs. The [O III] luminosity is correlated with the black hole mass (although no correlation between the extinction-corrected [O III] luminosity and the black hole mass), and no correlation is found between the Eddington ratio and the [O III] luminosity or the corrected [O III] luminosity. Three sets of two-component profiles are used to fit multiple emission transitions ([O III]lambda lambda 4959, 5007 and [O II]lambda lambda 3727, 3729) in these 33 stellar-light-subtracted spectra. We also measure the gas velocity dispersion (sigma(g)) from these multiple transitions, and find that the relation between sigma(g) and sigma(c)(*) becomes much weaker at higher redshifts than in smaller redshifts. The distribution of is 1.24 +/- 0.76 for the core [O III] line and 1.20 +/- 0.96 for the [O II] line, which suggests that sigma(g) of the core [O III] and [O II] lines can trace sigma(c)(*) within about 0.1 dex in the logarithm of sigma(c)(*). For the secondary driver, we find that the deviation of sigma(g) from sigma(c)(*) is correlated with the Eddington ratio.
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS记录号WOS:000241157100030
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被引频次:10[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/311005/238659
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
作者单位中国科学院高能物理研究所
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Bian WH,Bian, W,Gu, Q,et al. Stellar and gaseous velocity dispersions in type II AGNs at 0.3 < z < 0.83 from the Sloan Digital Sky Survey[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2006,372(2):876-884.
APA 卞维豪,Bian, W,Gu, Q,Zhao, Y,Chao, L,&Cui, Q.(2006).Stellar and gaseous velocity dispersions in type II AGNs at 0.3 < z < 0.83 from the Sloan Digital Sky Survey.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,372(2),876-884.
MLA 卞维豪,et al."Stellar and gaseous velocity dispersions in type II AGNs at 0.3 < z < 0.83 from the Sloan Digital Sky Survey".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 372.2(2006):876-884.
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