NAOC Open IR
Two New “Turn-off” Changing-look Active Galactic Nuclei and Implication on “Partially Obscured” AGNs
Wang,J.1,2; Xu,D. W.2,3; Wang,Y.4; Zhang,J. B.4; Zheng,J.4; Wei,J. Y.2,3
2019-12-05
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume887Issue:1
AbstractAbstract We report a spectroscopic identification of two new changing-look active galactic nuclei (CL-AGNs): SDSS J104705.16+544405.8 and SDSS J120447.91+170256.8, both with a “turn-off” type transition from type-1 to type-1.8/1.9. The identification is arrived at through a follow-up spectroscopic observation of the five CL-AGNs candidates that are extracted from the sample recently released in Macleod et al. The candidates are extracted by the authors from the Sloan Digit Sky Survey Data Release 7, and are spectroscopically confirmed quasars with large amplitude variability. By compiling a sample of 26 previously identified CL-AGNs, we confirm the claim by Macleod et al. that CL-AGNs tend to be biased against a low Eddington ratio, and identify an overlap between the CL-AGNs at their dim state and the so-called intermediate-type AGNs. The overlap implies that there two populations of the intermediate-type AGNs with different origins. One is due to the torus orientation effect, and the other to the intrinsic change of the accretion rate of the central supermassive black holes.
KeywordActive galactic nuclei Quasars Astrophysical masers
DOI10.3847/1538-4357/ab4d90
Language英语
WOS IDIOP:0004-637X-887-1-ab4d90
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/28656
Collection中国科学院国家天文台
Affiliation1.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, People's Republic of China; wj@bao.ac.cn
2.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; dwxu@bao.ac.cn
3.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, People's Republic of China
4.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang,J.,Xu,D. W.,Wang,Y.,等. Two New “Turn-off” Changing-look Active Galactic Nuclei and Implication on “Partially Obscured” AGNs[J]. The Astrophysical Journal,2019,887(1).
APA Wang,J.,Xu,D. W.,Wang,Y.,Zhang,J. B.,Zheng,J.,&Wei,J. Y..(2019).Two New “Turn-off” Changing-look Active Galactic Nuclei and Implication on “Partially Obscured” AGNs.The Astrophysical Journal,887(1).
MLA Wang,J.,et al."Two New “Turn-off” Changing-look Active Galactic Nuclei and Implication on “Partially Obscured” AGNs".The Astrophysical Journal 887.1(2019).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang,J.]'s Articles
[Xu,D. W.]'s Articles
[Wang,Y.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang,J.]'s Articles
[Xu,D. W.]'s Articles
[Wang,Y.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang,J.]'s Articles
[Xu,D. W.]'s Articles
[Wang,Y.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.