An analysis of a solar active region that produced many CMEs

	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
刊名	CHINESE ASTRONOMY AND ASTROPHYSICS
	2002-04
卷号	26 期号:2 页码:164-171
关键词	solar radio emission coronal mass ejection soft X-ray burst
ISSN号	0275-1062
通讯作者	Xia, ZG (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	CORONAL MASS EJECTIONS ; FLUX-ROPE MODELS ; BURSTS
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S0275106202000541
语种	英语
WOS记录号	WOS:000176345300005
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5606]
专题	云南天文台_射电天文研究组
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
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.(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.