The Response of the Lyα Line in Different Flare Heating Models
文献类型：期刊论文
| 作者 | Hong,Jie1,2; Li,Ying3 ; Ding,M. D.1,2; Carlsson,Mats4,5
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| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019-07-16 |
| 卷号 | 879期号:2 |
| 关键词 | line: profiles radiative transfer Sun: chromosphere Sun: flares |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab262e |
| 英文摘要 | Abstract The solar Lyα line is the strongest line in the ultraviolet waveband, and is greatly enhanced during solar flares. Here we present radiative hydrodynamic simulations of solar flares under different heating models, and calculate the response of this line taking into account nonequilibrium ionization of hydrogen and partial frequency redistribution. We find that in nonthermal heating models, the Lyα line can show a red or blue asymmetry corresponding to the chromospheric evaporation or condensation, respectively. The asymmetry may change from red to blue if the electron beam flux is large enough to produce a significant chromospheric condensation region. In the Lyα intensity light curve, a dip appears when the change of asymmetry occurs. In thermal models, the Lyα line intensity peaks quickly and then falls, and the profile has an overall red asymmetry, which is similar to the profiles from heating by a soft electron beam. The Lyα profile shows a single red peak at the end of thermal heating, and the whole line is formed in a very small height range. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-879-2-AB262E |
| 出版者 | The American Astronomical Society |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/27473]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.School of Astronomy and Space Science, Nanjing University, Nanjing 210023, People's Republic of China; jiehong@nju.edu.cn, dmd@nju.edu.cn 2.Key Laboratory for Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210023, People's Republic of China 3.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, People's Republic of China 4.Rosseland Centre for Solar Physics, University of Oslo, P.O. Box 1029 Blindern, NO-0315 Oslo, Norway 5.Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029 Blindern, NO-0315 Oslo, Norway |
| 推荐引用方式 GB/T 7714 | Hong,Jie,Li,Ying,Ding,M. D.,et al. The Response of the Lyα Line in Different Flare Heating Models[J]. The Astrophysical Journal,2019,879(2). |
| APA | Hong,Jie,Li,Ying,Ding,M. D.,&Carlsson,Mats.(2019).The Response of the Lyα Line in Different Flare Heating Models.The Astrophysical Journal,879(2). |
| MLA | Hong,Jie,et al."The Response of the Lyα Line in Different Flare Heating Models".The Astrophysical Journal 879.2(2019). |
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来源：紫金山天文台
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