Spectral analysis of the flare of 1998 November 11 based on the multi-cloud model

	Spectral analysis of the flare of 1998 November 11 based on the multi-cloud model
	Gu XM(顾啸马)1,3 ; Ding, MD 2
刊名	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2002-02
卷号	2 期号:1 页码:92-102
关键词	Sun : activity Sun : flares methods : data analysis
ISSN号	1009-9271
通讯作者	Gu, XM (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming, Peoples R China.
产权排序	第一完成单位
英文摘要	We 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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
分类号	P142
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	H-ALPHA-LINE ; NONTHERMAL PROCESSES ; SOLAR-FLARES ; LIMB FLARE ; LOOPS ; EVOLUTION ; COOL ; ASYMMETRIES ; PROFILES ; FIELDS
收录类别	SCI
原文出处	http://iopscience.iop.org/1009-9271/2/1/92/
语种	英语
WOS记录号	WOS:000174082600011
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6055]
专题	云南天文台_太阳物理研究组
作者单位	1.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
推荐引用方式 GB/T 7714	Gu XM,Ding, MD. 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.(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.