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Suspended and Restored Activities of a Nearby Supermassive Black Hole

文献类型：期刊论文

作者Wang, J.1,4; Xu, D. W.3,4; Sun, S. S.1,3; Feng, Q. C.4; Li, T. R.2; Xiao, P. F.4; Wei, J. Y.3,4
刊名ASTRONOMICAL JOURNAL
出版日期2020-06-01
卷号159期号:6页码:7
关键词Active galactic nuclei Emission line galaxies
ISSN号0004-6256
DOI10.3847/1538-3881/ab85cc
英文摘要The discovery of spectral type transition of active galactic nuclei (AGNs), the so-called "changing-look" (CL) phenomenon, challenges the widely accepted AGN paradigm, not only in the orientation-based unified model, but also in the standard disk model. In past decades, only a couple of nearby repeat changing-look active galactic nuclei (CL-AGNs) have been identified. Here we report spectroscopic observations of UGC 3223 over the course of 18 yr, from 2001 onwards. Combining the spectrum taken in 1987 by Stirpe, we have witnessed its type transitions from over 32 yr, and captured a long-lived (at least 10 yr) thorough "turn-off" state with a spectrum typical of a Seyfert 2 galaxy. The long-term thorough turn-off state probably suggests a once-dormant and an awakening central engine in UGC 3223. We argue that the (dis)appearance of the broad Balmer emission lines can be explained by the disk-wind broad-line region model given the evolution of the calculated Eddington ratio of accretion of the supermassive black hole.
WOS关键词ACTIVE GALACTIC NUCLEI ; BROAD-LINE REGION ; H-ALPHA ; VARIABILITY ; QUASARS ; AGN ; LUMINOSITY ; MODELS ; MASSES ; SIZE
资助项目National Natural Science Foundation of China[11773036] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15052600] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15016500] ; Natural Science Foundation of Guangxi[2018GXNSFGA281007] ; Bagui Young Scholars Program ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; National Aeronautics and Space Administration
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000531271500001
出版者IOP PUBLISHING LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation of Guangxi ; Natural Science Foundation of Guangxi ; Bagui Young Scholars Program ; Bagui Young Scholars Program ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation of Guangxi ; Natural Science Foundation of Guangxi ; Bagui Young Scholars Program ; Bagui Young Scholars Program ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation of Guangxi ; Natural Science Foundation of Guangxi ; Bagui Young Scholars Program ; Bagui Young Scholars Program ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation of Guangxi ; Natural Science Foundation of Guangxi ; Bagui Young Scholars Program ; Bagui Young Scholars Program ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration
源URL[http://ir.bao.ac.cn/handle/114a11/55016]  
专题中国科学院国家天文台
通讯作者Wang, J.
作者单位1.Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China
2.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Key Lab Space Astron & Technol, Natl Astron Observ, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Wang, J.,Xu, D. W.,Sun, S. S.,et al. Suspended and Restored Activities of a Nearby Supermassive Black Hole[J]. ASTRONOMICAL JOURNAL,2020,159(6):7.
APA Wang, J..,Xu, D. W..,Sun, S. S..,Feng, Q. C..,Li, T. R..,...&Wei, J. Y..(2020).Suspended and Restored Activities of a Nearby Supermassive Black Hole.ASTRONOMICAL JOURNAL,159(6),7.
MLA Wang, J.,et al."Suspended and Restored Activities of a Nearby Supermassive Black Hole".ASTRONOMICAL JOURNAL 159.6(2020):7.

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