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Spectral analysis of the flare of 1998 November 11 based on the multi-cloud model
Gu XM(顾啸马)1,3; Ding, MD2; Gu, XM (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming, Peoples R China.
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
2002-02
Volume2Issue:1Pages:92-102
DOI10.1088/1009-9271/2/1/92
ClassificationP142
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun : Activity Sun : Flares Methods : Data Analysis
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
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN1009-9271
URL查看原文
Archive Date2002-02-06
WOS IDWOS:000174082600011
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordH-ALPHA-LINE ; NONTHERMAL PROCESSES ; SOLAR-FLARES ; LIMB FLARE ; LOOPS ; EVOLUTION ; COOL ; ASYMMETRIES ; PROFILES ; FIELDS
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6055
Collection太阳物理研究组
Corresponding AuthorGu, XM (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming, Peoples R China.
Affiliation1.Yunnan Observatory, National Astronomical Observatories, CAS, Kunming 650011
2.Department of Astronomy, Nanjing University, Nanjing 210093
3.United Laboratory of Optical Astronomy, Chinese Academy of Sciences
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gu XM,Ding, MD,Gu, XM . 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):92-102.
APA Gu XM,Ding, MD,&Gu, XM .(2002).Spectral analysis of the flare of 1998 November 11 based on the multi-cloud model.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2(1),92-102.
MLA Gu XM,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):92-102.
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