Calculation of the broadening of HeI 10830 angstrom for a solar limb flare
文献类型：期刊论文
| 作者 | Li, H ; You, JQ
|
| 刊名 | CHINESE ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2002-07-01 |
| 卷号 | 26期号:3页码:293-300 |
| 关键词 | spectral line broadening solar flaxe excitation and ionization |
| ISSN号 | 0275-1062 |
| 英文摘要 | In this paper the Doppler and Stark broadening mechanisms of HeI 10830Angstrom are discussed and various broadening parameters calculated. The following conclusions are drawn: compared to the Doppler effect, the action of radiative damping on the broadening of HeI 10830Angstrom can be neglected. For the generally acknowledged value of electron density of flares (N-e = 3.2 x 10(13) cm(-3)), none of the damping terms can produce any discernible broadening. Up to N-e = 10(15) cm(-3), none of the various types of damping can effect an increase in the half-width of the line center, and the maximum increase is of the order of 10(-3)Angstrom. Therefore, the broadening at the line center may always be thought to be Doppler broadening. When N-e > 10(14) cm(-3), Stark broadening, especially the Stark broadening of electrons, plays the chief role in the broadening of HeI 10830Angstrom. If the wings of the Stark-broadened profile are to be 2-3 times larger than those of the purely Doppler-broadened profile, then the half-width of damping broadening should be comparable to Deltalambda(D). If the observed profile of the limb flare of 1989 is interpreted as Stark broadening, then the electron density would be as high as 10(17) cm(-3). The collisional damping (gamma(3)) with helium atoms causes clearly different amounts of broadening on the components I-12 and I-3: the effect is one order of magnitude higher on I-12 than on I-3. But our observation shows that the wing extensions of I-12 and I-3 are basically the same, so it is impossible that our observed profile is produced by gamma(3). |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000177827900005 |
| 公开日期 | 2013-01-29 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/7921]  |
| 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 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, H,You, JQ. Calculation of the broadening of HeI 10830 angstrom for a solar limb flare[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,2002,26(3):293-300. |
| APA | Li, H,&You, JQ.(2002).Calculation of the broadening of HeI 10830 angstrom for a solar limb flare.CHINESE ASTRONOMY AND ASTROPHYSICS,26(3),293-300. |
| MLA | Li, H,et al."Calculation of the broadening of HeI 10830 angstrom for a solar limb flare".CHINESE ASTRONOMY AND ASTROPHYSICS 26.3(2002):293-300. |
入库方式： OAI收割
来源：紫金山天文台
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