Variability of optical FeII complex in narrow-line Seyfert 1 galaxy NGC 4051
文献类型：期刊论文
| 作者 | Wang, J; Wei, JY ; He, XT
|
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2005-06-01 |
| 卷号 | 436期号:2页码:417-426 |
| 关键词 | galaxies : active galaxies : individual : NGC4051 galaxies : quasars : emission lines |
| 英文摘要 | The variability of optical FeII blends in NGC4051 is examined from spectra extracted from the AGN Watch program. In our analysis, the FeII complex are subtracted and measured, with the following results. Firstly, the FeII. variations were detected in NGC4051 during a 3-year period. The identified FeII. variations followed the variations in continuum closely. Secondly, the EW of FeII. is reported to increase with rising continuum flux, which is consistent with previous claims that there is no convincing Baldwin E. ect in optical FeII. Thirdly, by comparing the variations of H beta and FeII., we find that R-Fe scales with continuum flux as RFe. (5.0 +/- 0.8) log(L/M), which is significantly different from the theoretical expectations. Finally, in six selected Seyferts, four out of five Narrow-Line Seyfert 1 galaxies present positive correlation between RFe and the continuum flux. The negative correlations are identified in the remaining two objects that have relatively broad profiles of H beta (FWHM > 1500 km s(-1)). We argue that the difference of electron density of broad line clouds and/or variability behavior of incident high-energy radiation can explain the dichotomy in variability behavior of R-Fe. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000229475600012 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6982]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, J,Wei, JY,He, XT. Variability of optical FeII complex in narrow-line Seyfert 1 galaxy NGC 4051[J]. ASTRONOMY & ASTROPHYSICS,2005,436(2):417-426. |
| APA | Wang, J,Wei, JY,&He, XT.(2005).Variability of optical FeII complex in narrow-line Seyfert 1 galaxy NGC 4051.ASTRONOMY & ASTROPHYSICS,436(2),417-426. |
| MLA | Wang, J,et al."Variability of optical FeII complex in narrow-line Seyfert 1 galaxy NGC 4051".ASTRONOMY & ASTROPHYSICS 436.2(2005):417-426. |
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来源：国家天文台
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