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Identification of SDSS J141324.27+530527.0 as a New “Changing-look” Quasar with a “Turn-on” Transition
Wang,J.1,2; Xu,D. W.1,2; Wei,J. Y.1,2
2018-05-03
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume858Issue:1
AbstractAbstract We report an identification of SDSS J141324+530527.0 (SBS 1411+533) at z?=?0.456344 as a new “changing-look” quasar with a “turn-on” spectral type transition from Type-1.9/2 to Type-1 within a rest-frame timescale of 1–10 yr by a comparison of our new spectroscopic observation and the Sloan Digital Sky Survey (SDSS) archive database. The SDSS DR7 spectrum taken in 2003 is dominated by a starlight emission from host galaxy redward of the Balmer limit, and has a non-detectable broad Hβ line. The new spectrum taken by us on 2017 June 1 and the SDSS DR14 spectrum taken on 2017 May 29 indicate that the object has a typical quasar spectrum with a blue continuum and strong Balmer broad emission lines. In addition, an intermediate spectral type can be identified in the SDSS DR13 spectrum taken in 2015. The invariability of the line wing of Mg iiλ2800 emission and timescale argument (the invariability of [O iii]λ5007 line blue asymmetry) suggests that a variation of obscuration (an accelerating outflow) is not a favorable scenario. The timescale argument allows us to believe the type transition is possibly caused by either a viscous radial inflow or a disk instability around a black hole.
Keywordgalaxies: active galaxies: nuclei quasars: emission lines quasars: individual (SDSS J141324+530527)
DOI10.3847/1538-4357/aab88b
Language英语
WOS IDIOP:0004-637X-858-1-aab88b
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/35574
Collection中国科学院国家天文台
Affiliation1.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China; wj@bao.ac.cn
2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, People's Republic of China; dwxu@bao.ac.cn
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang,J.,Xu,D. W.,Wei,J. Y.. Identification of SDSS J141324.27+530527.0 as a New “Changing-look” Quasar with a “Turn-on” Transition[J]. The Astrophysical Journal,2018,858(1).
APA Wang,J.,Xu,D. W.,&Wei,J. Y..(2018).Identification of SDSS J141324.27+530527.0 as a New “Changing-look” Quasar with a “Turn-on” Transition.The Astrophysical Journal,858(1).
MLA Wang,J.,et al."Identification of SDSS J141324.27+530527.0 as a New “Changing-look” Quasar with a “Turn-on” Transition".The Astrophysical Journal 858.1(2018).
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