Study of Outflows in Luminous Quasars at Redshift similar to 0.4-0.8
文献类型：期刊论文
| 作者 | Xu, D. W.2 ; Wei, J. Y.2; Wang, J.1,2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2018 |
| 卷号 | 852期号:1 |
| 关键词 | Galaxies: Active Galaxies: Nuclei Quasars: Emission Lines |
| DOI | 10.3847/1538-4357/aa9d1b |
| 文献子类 | Article |
| 英文摘要 | We perform a systematic study of outflow in the narrow-line region (NLR) of active galactic nuclei (AGNs) at z similar to 0.4-0.8 based upon a large sample of similar to 900 quasars at z similar to 0.4-0.8. The sample is extracted from the Sloan Digital Sky Survey by mainly requiring that (1) the g-band magnitude is brighter than 19 mag and (2) the [O III]lambda 5007 emission line has a signal-to-noise ratio larger than 30. Profiles of multiple emission lines are modeled by a sum of several Gaussian functions. The spectral analysis allows us to identify (1) a prevalence of both [O III]lambda 5007 line blue asymmetry and bulk velocity blueshift of both [Ne III]lambda 3869 and [Ne III]lambda 3426 lines, when the [O II]lambda 3727 line is used as a reference. The velocity offset of the [O III]lambda 5007 line is, however, distributed around a value of zero, except for a few outliers. (2) Not only the significant [O III]lambda 5007 line asymmetry, but also the large bulk velocity offsets of [Ne III]lambda 3869 and [Ne V]lambda 3426 emission lines tend to occur in the objects with high L/L-Edd, which is considerably consistent with the conclusions based on local AGNs. With three M-BH estimation methods, the significance level of the trend is found to be better than 2.9 sigma, 3.2 sigma, and 1.8 sigma for [O III], [Ne III], and [Ne V], respectively. After excluding the role of radio jets, the revealed dependence of NLR gas outflow on L/L-Edd allows us to argue that the pressure caused by the wind/radiation launched/emitted from a central supermassive black hole is the most likely origin of the outflow in these distant quasars, which implies that the outflow in luminous AGNs up to z similar to 1 have the same origin. |
| WOS关键词 | ACTIVE GALACTIC NUCLEI ; NARROW-LINE REGION ; SUPERMASSIVE BLACK-HOLES ; RADIO-QUIET QUASARS ; DIGITAL SKY SURVEY ; DRIVEN DISK WINDS ; FE-II EMISSION ; SEYFERT-1 GALAXIES ; AGN FEEDBACK ; ELLIPTIC GALAXIES |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000419178500004 |
| 资助机构 | National Natural Science Foundation of China(11473036 ; National Natural Science Foundation of China(11473036 ; 11773036) ; 11773036) ; National Natural Science Foundation of China(11473036 ; National Natural Science Foundation of China(11473036 ; 11773036) ; 11773036) |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/20343]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Space Astron & Technol, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, D. W.,Wei, J. Y.,Wang, J.. Study of Outflows in Luminous Quasars at Redshift similar to 0.4-0.8[J]. ASTROPHYSICAL JOURNAL,2018,852(1). |
| APA | Xu, D. W.,Wei, J. Y.,&Wang, J..(2018).Study of Outflows in Luminous Quasars at Redshift similar to 0.4-0.8.ASTROPHYSICAL JOURNAL,852(1). |
| MLA | Xu, D. W.,et al."Study of Outflows in Luminous Quasars at Redshift similar to 0.4-0.8".ASTROPHYSICAL JOURNAL 852.1(2018). |
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来源：国家天文台
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