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Spectral Analysis of the Flare of 1998 November 11 based on the Multi-cloud Model
Gu XiaoMa1; Ding MingDe2
2002
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume2Issue:1Pages:92
AbstractWe have obtained 2D spectra of Halpha and CaII lambda 8542Angstrom for the flare of 1998 November 11, and derived its 2D velocity field and integrated intensity field, The velocity distribution shows that the red-shift and blue-shift velocities lie respectively in the northern and southern parts of the flare and that the maximum velocity seems to be located in two footpoints of the flare loop system. The integrated intensity distribution shows that the CaII lambda 8542Angstrom line is formed at a lower height than the Halpha line. we used 'multi-cloud model' (MCM) to obtain four parameters for the two lines (Doppler width, Deltalambda(D), Doppler shift, Deltalambda(0), line source function, S, and optical depth at the line center, tau(0)). We also estimated the column number densities of hydrogen at the second level, N-2, and of the ionized calcium at the third level, N-3, as well as the kinetic temperature, T-c. The wide Halpha profile at the loop top may be explained by an overlapping of two or more elementary profiles. It is shown that the uncertainty in calibration does not affect the derived Doppler shift and line broadening, only the source function and optical depth.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/53524
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.南京大学
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gu XiaoMa,Ding MingDe. Spectral Analysis of the Flare of 1998 November 11 based on the Multi-cloud Model[J]. Chinese Journal of Astronomy and Astrophysics,2002,2(1):92.
APA Gu XiaoMa,&Ding MingDe.(2002).Spectral Analysis of the Flare of 1998 November 11 based on the Multi-cloud Model.Chinese Journal of Astronomy and Astrophysics,2(1),92.
MLA Gu XiaoMa,et al."Spectral Analysis of the Flare of 1998 November 11 based on the Multi-cloud Model".Chinese Journal of Astronomy and Astrophysics 2.1(2002):92.
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