Impulsive phase He 10830 spectra of a large solar limb flare of 16 August 1989
文献类型：期刊论文
| 作者 | You, JQ; Wang, CJ; Fan, ZY; Li, H
|
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 1998-10-01 |
| 卷号 | 182期号:2页码:431-446 |
| ISSN号 | 0038-0938 |
| 关键词 | ASYMMETRY EMISSION LINE |
| 英文摘要 | We obtained simultaneously He I 10830 Angstrom spectra, H alpha filtergrams and microwave data of a large limb hare (2N/X20) in 1989. In this paper we characterize He I 10830 spectra in I-elation to the impulsive phase. All the He I 10830 spectra, except those of the surge, show blue shift or blue asymmetry. The velocities inferred from the spectra range from a few to 160 km s(-1), implying that the horizontal motion is very likely present in the structure of this flare at different heights. The He I 10830 profiles of a flare are relatively broad and cannot be simulated by the Doppler broadening mechanism with a uniform flare model atmosphere. It is most likely that these characteristics are related to rapid and localized heating in the low and middle chromosphere. Comparing the SXR and microwave data with the optical data leads to the following scenario: the corona was already heated to some extent before the Bare onset, and in the first 2 minutes of the impulsive phase, heat conduction was the main source or, at least, a competitive source, for chromospheric heating. However, the impulsive event, associated with the unusually broadened He I 10830 line (Delta lambda(f) > 20 Angstrom) and temporally correlated with a microwave burst, is probably caused by electron-beam hearing. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ASYMMETRY ; EMISSION ; LINE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000077322300010 |
| 公开日期 | 2013-02-05 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/8341]  |
| 专题 | 紫金山天文台_太阳高能及相关物理过程研究团组 |
| 作者单位 | Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | You, JQ,Wang, CJ,Fan, ZY,et al. Impulsive phase He 10830 spectra of a large solar limb flare of 16 August 1989[J]. SOLAR PHYSICS,1998,182(2):431-446. |
| APA | You, JQ,Wang, CJ,Fan, ZY,&Li, H.(1998).Impulsive phase He 10830 spectra of a large solar limb flare of 16 August 1989.SOLAR PHYSICS,182(2),431-446. |
| MLA | You, JQ,et al."Impulsive phase He 10830 spectra of a large solar limb flare of 16 August 1989".SOLAR PHYSICS 182.2(1998):431-446. |
入库方式： OAI收割
来源：紫金山天文台
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