中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。