Identification of SDSS J141324.27+530527.0 as a New “Changing-look” Quasar with a “Turn-on” Transition

doi:10.3847/1538-4357/aab88b

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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
刊名	The Astrophysical Journal
	2018-05-03
卷号	858 期号:1
关键词	galaxies: active galaxies: nuclei quasars: emission lines quasars: individual (SDSS J141324+530527)
ISSN号	0004-637X
DOI	10.3847/1538-4357/aab88b
英文摘要	Abstract 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.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-858-1-AAB88B
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/35573]
专题	中国科学院国家天文台
作者单位	1.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
推荐引用方式 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).