NAOC Open IR
Revisiting the long-term X-ray spectral evolution of Seyfert 1 galaxies
Weng, Shan-Shan1,2; Chen, Ying1,2; Wang, Ting-Ting1,2; Cai, Zhen-Yi3,4; Qiao, Erlin5,6; Liao, Neng-Hui7
2020
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume491Issue:2Pages:2576-2603
AbstractCharacterizing the long-term variability of active galactic nuclei (AGNs) is a key legacy of the Rossi X-ray Timing Explorer (RXTE). We carry out a spectral analysis on a sample of 20 Seyfert 1 galaxies, which had been observed by the RXTE for at least 100 times. All 18 335 spectra are fitted in a uniform way using a power-law component plus an additional Gaussian line when necessary. For any source in our sample, we confirm that the spectrum softens or the photon index, Gamma, increases with increasing the 2-10 keV luminosity, LX. However, different source holds distinct Gamma-L-X/L-Edd relation, rather than a common one. We also fit the correlation with a function of Gamma = C+ beta xlog (flux), where C is a constant and parameter beta is the slope of the correlation. In this way, the increase speed of the Gamma-L-X/L-Edd relation can be depicted with the parameter beta. Since our sample contains a large sample of long-term monitored sources, it allows us to explore the second-order effect of spectral evolution. We find that there is an anticorrelation between beta and the X-ray Eddington ratio, L-X/L-Edd. That is, the increasing tendency of Gamma with increasing X-ray luminosity becomes slower when the source has a larger X-ray Eddington ratio. Our results may indicate changes in the geometry and/or the viscosity parameter of the accretion disc at different Eddington ratios.
Keywordgalaxies: active galaxies: Seyfert X-rays: galaxies
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Gravitational Wave Pilot B ; Gravitational Wave Pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation from Jiangsu Province of China ; Natural Science Foundation from Jiangsu Province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Gravitational Wave Pilot B ; Gravitational Wave Pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation from Jiangsu Province of China ; Natural Science Foundation from Jiangsu Province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Gravitational Wave Pilot B ; Gravitational Wave Pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation from Jiangsu Province of China ; Natural Science Foundation from Jiangsu Province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Gravitational Wave Pilot B ; Gravitational Wave Pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation from Jiangsu Province of China ; Natural Science Foundation from Jiangsu Province of China
DOI10.1093/mnras/stz3217
WOS KeywordBLACK-HOLE MASSES ; EMISSION-LINE PROPERTIES ; ACTIVE GALACTIC NUCLEI ; EDDINGTON RATIO ; INTRINSIC SIGNATURE ; PHOTON INDEX ; POWER-LAW ; ACCRETION ; REGION ; COMPTONIZATION
Language英语
Funding ProjectNational Natural Science Foundation of China[11673013] ; National Natural Science Foundation of China[11703014] ; National Natural Science Foundation of China[11873045] ; National Natural Science Foundation of China[11773037] ; National Natural Science Foundation of China[11703093] ; National Natural Science Foundation of China[11573023] ; Gravitational Wave Pilot B[XDB23040100] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15052100] ; Natural Science Foundation from Jiangsu Province of China[BK20171028]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Gravitational Wave Pilot B ; Gravitational Wave Pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation from Jiangsu Province of China ; Natural Science Foundation from Jiangsu Province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Gravitational Wave Pilot B ; Gravitational Wave Pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation from Jiangsu Province of China ; Natural Science Foundation from Jiangsu Province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Gravitational Wave Pilot B ; Gravitational Wave Pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation from Jiangsu Province of China ; Natural Science Foundation from Jiangsu Province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Gravitational Wave Pilot B ; Gravitational Wave Pilot B ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Natural Science Foundation from Jiangsu Province of China ; Natural Science Foundation from Jiangsu Province of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000512302100076
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/54105
Collection中国科学院国家天文台
Corresponding AuthorWeng, Shan-Shan
Affiliation1.Nanjing Normal Univ, Dept Phys, Nanjing 210023, Peoples R China
2.Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210023, Peoples R China
3.Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China
4.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
5.Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100012, Peoples R China
6.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
7.Guizhou Univ, Coll Phys, Dept Phys & Astron, Guiyang 550025, Peoples R China
Recommended Citation
GB/T 7714
Weng, Shan-Shan,Chen, Ying,Wang, Ting-Ting,et al. Revisiting the long-term X-ray spectral evolution of Seyfert 1 galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,491(2):2576-2603.
APA Weng, Shan-Shan,Chen, Ying,Wang, Ting-Ting,Cai, Zhen-Yi,Qiao, Erlin,&Liao, Neng-Hui.(2020).Revisiting the long-term X-ray spectral evolution of Seyfert 1 galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,491(2),2576-2603.
MLA Weng, Shan-Shan,et al."Revisiting the long-term X-ray spectral evolution of Seyfert 1 galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 491.2(2020):2576-2603.
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