| SDSSJ022119.84＋005628.4： A Radio-Loud Narrow-LineSeyfert 1 Galaxy with Star Formation in its Nucleus |
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| 作者姓名： | Jing Wang Jian-Yan Wei and Xiang-Tao He |
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| 作者单位： | Jing Wang,Jian-Yan Wei and Xiang-Tao He
1 Department of Astronomy,Beijing Normal University,Beijing 100875;
2 National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012 |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | The optical spectrum of SDSS J022119.84 + 005628.4 (R. A. = 02h 21m 19.84s, Dec = 00°56' 28.4", J2000; z = 0.399785 ± 0.000558) is analyzed by multi-component profile modelling. The small flux ratio of OⅢ]NC/Hβ (=0.78) and FWHM(HβBC) = 1778.1 ±85.9 km s-1 led us to identify SDSS J022119.84 + 005628.4 as a Narrow-line Seyfert 1 galaxy with RFe= 1.4-1.0+1.0 and intermediate radio loudness, logR = 1.93. The continuum low jump at the Balmer limit might be contributed by a starburst component, which suggests that the object is a relatively young AGN with star-formation activity in its inner region. This provides a useful observational test of the AGN evolution. The low flux ratio of the narrow components, OⅢ]/Hβ = 1.62, and the prominent OⅡ]γ3727 emission, OⅡ]/OⅢ] = 2.24, suggests that there should be a group of AGNs different from Seyfert 2s when their broad line regions are obscured by the torus on the line of sight. A possible orientation effect is suggested to interpret the observed Seyf
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| 关 键 词： | 光谱 剖面模型 天文学 星团 通量比率 |
SDSSJ022119.84+005628.4:A Radio-Loud Narrow-Line Seyfert 1 Galaxy with Star Formation in its Nucleus |
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| Jing Wang,Jian-Yan Wei and Xiang-Tao He
.SDSSJ022119.84+005628.4:A Radio-Loud Narrow-Line Seyfert 1 Galaxy with Star Formation in its Nucleus[J].Chinese Journal of Astronomy and Astrophysics,2004,4(5):415-426. |
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| Authors: | Jing Wang Jian-Yan Wei and Xiang-Tao He |
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| Institution: | Jing Wang,Jian-Yan Wei and Xiang-Tao He
1 Department of Astronomy,Beijing Normal University,Beijing 100875,
2 National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012 |
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| Abstract: | |
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| Keywords: | galaxies: active - galaxies: Seyfert - quasars: individual (SDSS J022119 84 + 005628 4) |
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