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On the formation of the He I 10830 angstrom line in a flaring atmosphere

文献类型：期刊论文

作者Ding, MD; Li, H; Fang, C
刊名ASTRONOMY & ASTROPHYSICS
出版日期2005-03-01
卷号432期号:2页码:699-704
关键词line : profiles Sun : atmosphere Sun : flares stars : atmospheres
ISSN号0004-6361
英文摘要We explore the formation of the He. 10 830 Angstrom line in a flaring atmosphere, with special attention to the nonthermal effects of an electron beam. Using non-LTE calculations we obtain the line profiles from different model atmospheres. Without the nonthermal effects, the line changes from weak absorption in a cool atmosphere to emission in a hot and condensed atmosphere, as expected. However, the presence of an electron beam can significantly change the line strength, producing much stronger absorption and emission in these two cases. We find that in the nonthermal case, the collisional ionization of He. followed by recombinations becomes an important process in populating the triplet levels corresponding to the He I 10 830 Angstrom line. These results suggest that the He I 10 830 Angstrom line is also a potential diagnostic tool for nonthermal effects in solar or stellar flares.
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
关键词[WOS]SOLAR TRANSITION REGION ; NONTHERMAL PROCESSES ; NEUTRAL HELIUM ; CHROMOSPHERIC FLARES ; NANOMETER LINE ; ENERGY-LEVELS ; EXCITATION ; CONTINUUM ; MODELS ; DIAGNOSTICS
收录类别SCI
语种英语
WOS记录号WOS:000227494200039
公开日期2012-03-07
源URL[http://159.226.72.40/handle/332002/4106]  
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.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
推荐引用方式
GB/T 7714		 Ding, MD,Li, H,Fang, C. On the formation of the He I 10830 angstrom line in a flaring atmosphere[J]. ASTRONOMY & ASTROPHYSICS,2005,432(2):699-704.
APA Ding, MD,Li, H,&Fang, C.(2005).On the formation of the He I 10830 angstrom line in a flaring atmosphere.ASTRONOMY & ASTROPHYSICS,432(2),699-704.
MLA Ding, MD,et al."On the formation of the He I 10830 angstrom line in a flaring atmosphere".ASTRONOMY & ASTROPHYSICS 432.2(2005):699-704.

入库方式： OAI收割

来源：紫金山天文台

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