An analysis of a solar active region that produced many CMEs

doi:10.1016/S0275-1062(02)00054-1

YNAO OpenIR > 射电天文研究组

	An analysis of a solar active region that produced many CMEs
	Xia ZG(夏志国)1,2 ; Wang M(汪敏)1,2 ; Zhang BR(张柏荣)1,2 ; Yang, YH2 ; Xia, ZG (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China.
发表期刊	CHINESE ASTRONOMY AND ASTROPHYSICS
	2002-04
卷号	26 期号:2 页码:164-171
DOI	10.1016/S0275-1062(02)00054-1
产权排序	第1完成单位
收录类别	SCI
关键词	Solar Radio Emission Coronal Mass Ejection Soft X-ray Burst
摘要	In April and May of 1998, six large burst events occurred one after the other in the active region AR8210. We have collected the data of this active region, including its soft X-rays, ultraviolet radiation, radio type-II and -IV bursts as well as its radioheliograph observations. It is found that the process of energy accumulation was rapid and the time profiles of three soft X-ray bursts exhibited a certain similarity. When coronal mass ejections (CMEs) took place, the magnetic loops in this active region were only partially open and they soon contracted to become a closed loop. Under the bombardment of nonthermal electrons, the active region was again heated and it produced intense X-ray bursts as well as type-II and -IV bursts. The weak part of the magnetic loop was like a volcanic crater from which CMEs can easily erupt again. The turn-off point, where non-thermal and thermal processes intersect, was found: on the SXR time profile it is a point of sudden change of slope, and type-III bursts, that successively occur in various layers of the corona, may be taken to be convincing evidence of the occurrence of CMEs and also a criterion for estimating the velocity of the CMEs.
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0275-1062
URL	查看原文
WOS记录号	WOS:000176345300005
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	CORONAL MASS EJECTIONS ; FLUX-ROPE MODELS ; BURSTS
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/5606
专题	射电天文研究组
通讯作者	Xia, ZG (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China.
作者单位	1.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Xia ZG,Wang M,Zhang BR,et al. An analysis of a solar active region that produced many CMEs[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,2002,26(2):164-171.
APA	Xia ZG,Wang M,Zhang BR,Yang, YH,&Xia, ZG .(2002).An analysis of a solar active region that produced many CMEs.CHINESE ASTRONOMY AND ASTROPHYSICS,26(2),164-171.
MLA	Xia ZG,et al."An analysis of a solar active region that produced many CMEs".CHINESE ASTRONOMY AND ASTROPHYSICS 26.2(2002):164-171.

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