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X-Ray Spectral Shape Variation in Changing-look Seyfert Galaxy SDSS J155258+273728

文献类型：期刊论文

作者Ai, Yanli1; Dou, Liming2,3; Yang, Chenwei4,5; Sun, Luming5,6; Xie, Fu-Guo7; Yao, Su8; Wu, Xue-Bing8,9; Wang, Tinggui5,6; Shu, Xinwen10; Jiang, Ning5,6
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2020-02-20
卷号890期号:2页码:9
ISSN号2041-8205
DOI10.3847/2041-8213/ab7306
英文摘要We analyze the X-ray, optical, and mid-infrared data of a "changing-look" Seyfert galaxy SDSS J155258+273728 at z similar or equal to 0.086. Over a period of one decade (2009-2018), its broad H alpha line intensity increased by a factor of similar to 4. Meanwhile, the X-ray emission in 2014 as observed by Chandra was about five times brighter than that in 2010 by Suzaku, and the corresponding emissions in the V-band, mid-infrared W1 band brighten by similar to 0.18, 0.32 mag, respectively. Moreover, the absorption in X-rays is moderate and stable, i.e., N-H similar to 10(21) cm(-2), but the X-ray spectrum becomes harder in the 2014 Chandra bright state (i.e., photon index Gamma = 1.52(-0.06)(+0.06)) than that of the 2010 Suzaku low state (Gamma = 2.03(-0.21)(+0.22)). With an Eddington ratio being lower than a few percent, the inner region of the accretion disk in SDSS J155258+273728 is likely a hot accretion flow. We then compile from literature the X-ray data of "changing-look" active galactic nuclei (AGNs), and find that they generally follow the well-established "V"-shaped correlation in AGNs, that is, above a critical turnover luminosity the X-ray spectra soften with the increasing luminosity, and below that luminosity the trend is reversed in the way of "harder when brighter." This presents direct evidence that CL-AGNs have distinctive changes in not only the optical spectral type, but also the X-ray spectral shape. The similarity in the X-ray spectral evolution between CL-AGNs and black hole X-ray binaries indicates that the observed CL-AGNs phenomena may relate to the state transition in accretion physics.
WOS关键词ACTIVE GALACTIC NUCLEI ; ACCRETION FLOWS ; PHOTON INDEX ; DATA RELEASE ; LUMINOSITY ; AGN ; VARIABILITY ; EMISSION ; BINARIES ; STATE
资助项目National Science Foundation of China (NSFC)[U1731109] ; National Science Foundation of China (NSFC)[11673077] ; National Science Foundation of China (NSFC)[11733010] ; National Science Foundation of China (NSFC)[U1731103] ; National Science Foundation of China (NSFC)[11833007] ; National Science Foundation of China (NSFC)[11833001] ; NSFC[U1731103] ; NSFC[11833007] ; NSFC[11833001] ; NSFC[U1731104] ; NSFC[11733001] ; NSFC[11873074] ; NSFC[11533001] ; NSFC[11721303] ; NSFC[11822301] ; National Program on Key R&D Project of China (NPKRDPC)[2016YFA0400804] ; NPKRDPC[2016YFA0400703] ; National Astronomical Observatories, Chinese Academy of Sciences ; Ministry of Finance ; National Aeronautics and Space Administration
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000521421600001
资助机构National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; NSFC ; NSFC ; National Program on Key R&D Project of China (NPKRDPC) ; National Program on Key R&D Project of China (NPKRDPC) ; NPKRDPC ; NPKRDPC ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; Ministry of Finance ; Ministry of Finance ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; NSFC ; NSFC ; National Program on Key R&D Project of China (NPKRDPC) ; National Program on Key R&D Project of China (NPKRDPC) ; NPKRDPC ; NPKRDPC ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; Ministry of Finance ; Ministry of Finance ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; NSFC ; NSFC ; National Program on Key R&D Project of China (NPKRDPC) ; National Program on Key R&D Project of China (NPKRDPC) ; NPKRDPC ; NPKRDPC ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; Ministry of Finance ; Ministry of Finance ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; NSFC ; NSFC ; National Program on Key R&D Project of China (NPKRDPC) ; National Program on Key R&D Project of China (NPKRDPC) ; NPKRDPC ; NPKRDPC ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; Ministry of Finance ; Ministry of Finance ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration
源URL[http://ir.bao.ac.cn/handle/114a11/55618]  
专题中国科学院国家天文台
通讯作者Ai, Yanli
作者单位1.Sun Yat Sen Univ, Sch Phys & Astron, Guangzhou 510275, Peoples R China
2.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China
3.Dept Educ Guangdong Prov, Astron Sci & Technol Res Lab, Guangzhou 510006, Guangdong, Peoples R China
4.Polar Res Inst China, State Ocean Adm, Key Lab Polar Sci, Antarct Astron Res Div, Shanghai, Peoples R China
5.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei, Peoples R China
6.Univ Sci & Technol China, Chinese Acad Sci, Dept Astron, Key Lab Res Galaxies & Cosmol, Hefei, Peoples R China
7.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
8.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
9.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
10.Anhui Normal Univ, Dept Phys, Wuhu 241000, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Ai, Yanli,Dou, Liming,Yang, Chenwei,et al. X-Ray Spectral Shape Variation in Changing-look Seyfert Galaxy SDSS J155258+273728[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,890(2):9.
APA Ai, Yanli.,Dou, Liming.,Yang, Chenwei.,Sun, Luming.,Xie, Fu-Guo.,...&Jiang, Ning.(2020).X-Ray Spectral Shape Variation in Changing-look Seyfert Galaxy SDSS J155258+273728.ASTROPHYSICAL JOURNAL LETTERS,890(2),9.
MLA Ai, Yanli,et al."X-Ray Spectral Shape Variation in Changing-look Seyfert Galaxy SDSS J155258+273728".ASTROPHYSICAL JOURNAL LETTERS 890.2(2020):9.

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来源：国家天文台

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