Converging motion of conjugate flaring kernels during two large solar flares

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳活动的多波段观测研究团组

	Converging motion of conjugate flaring kernels during two large solar flares
	Zhou, Tuanhui1,2 ; Ji, Haisheng1 ; Huang, Guangli 1
刊名	ADVANCES IN SPACE RESEARCH
	2008
卷号	41 期号:8 页码:1195-1201
关键词	solar flares hard X-ray magnetic fields
ISSN号	0273-1177
英文摘要	In this paper, we analyze the footpoint motion of two large solar flares using observations made by the Transition Region and Coronal Explorer (TRACE) and Reuven Ramaty High Energy Solar Spectroscopic imager (RHESSI). The two flares are the M5.7 flare of March 14, 2002 and the X 10 flare of October 29, 2003. They are both classical two-ribbon flares as observed in TRACE 1600 or 171 angstrom images and have long-duration Conjugate hard X-ray (HXR) footpoint emission. We use the 'center-of-mass' method to locate the centroids of the UV/EUV flare ribbons. The results are: (1) The conjugate UV/EUV ribbons and HXR footpoints of the two flares show a converging (inward) motion during the impulsive phase. For the two flares, the converging motion lasts about 3 and 10 min, respectively. The usual separation (outward) motion for the flare ribbons and footpoints take place only after the converging motion. (2) During the inward and the outward motion, the conjugate ribbons and footpoints of the two events exhibit a strong unshear motion. In obtaining above results, TRACE UV/EUV and RHESSI HXR data show all overall agreement. The two events demonstrate that the magnetic reconnection for the flares occurs in highly sheared magnetic field. Furthermore, the results support the magnetic model constructed by A et at. [Ji, H., Huang, G., Wang, H. Astrophys. J. 660, 893-900, 2007], who proposed that the contracting motion of flaring loops is the signature of the relaxation of sheared magnetic fields. (C) 2007 COSPAR. Published by Elsevier Ltd. All rights reserved.
学科主题	Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
研究领域[WOS]	Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
关键词[WOS]	X-RAY SOURCES ; CURRENT SHEET ; A MISSION ; SHRINKAGE ; FIELD ; RECONNECTION ; RELAXATION ; FOOTPOINTS ; RHESSI ; LOOPS
收录类别	SCI
语种	英语
WOS记录号	WOS:000255602300005
公开日期	2011-12-30
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/2043]
专题	紫金山天文台_太阳活动的多波段观测研究团组
作者单位	1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Tuanhui,Ji, Haisheng,Huang, Guangli. Converging motion of conjugate flaring kernels during two large solar flares[J]. ADVANCES IN SPACE RESEARCH,2008,41(8):1195-1201.
APA	Zhou, Tuanhui,Ji, Haisheng,&Huang, Guangli.(2008).Converging motion of conjugate flaring kernels during two large solar flares.ADVANCES IN SPACE RESEARCH,41(8),1195-1201.
MLA	Zhou, Tuanhui,et al."Converging motion of conjugate flaring kernels during two large solar flares".ADVANCES IN SPACE RESEARCH 41.8(2008):1195-1201.