AN EXTREME ULTRAVIOLET WAVE ASSOCIATED WITH A MICRO-SIGMOID ERUPTION

	AN EXTREME ULTRAVIOLET WAVE ASSOCIATED WITH A MICRO-SIGMOID ERUPTION
	Zheng RS(郑瑞生); Jiang YC(姜云春); Yang JY(杨家艳); Bi Y(毕以); Hong JC(洪俊超); Yang D(杨丹); Yang B(杨波)
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2012-07-10
卷号	753 期号:2 页码:29-35
关键词	Sun: activity Sun: corona Sun: filaments prominences
ISSN号	2041-8205
通讯作者	Zheng, RS (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	Taking advantage of the high temporal and spatial resolution of the Solar Dynamics Observatory (SDO) observations, we present an extreme ultraviolet (EUV) wave associated with a micro-sigmoid eruption on 2010 October 21. The micro-sigmoid underwent a typical "sigmoid-to-arcade" evolution via tether-cutting reconnection, accompanied by a B1.7 flare, a filament eruption, and coronal twin dimmings. In the eruption, the newly formed sigmoidal loops expanded quickly, and the expansion likely triggered an EUV wave. The wave onset was nearly simultaneous with the start of the eruption and the associated flare. The wave had a nearly circular front and propagated at a constant velocity of 270-350 km s(-1) with very little angular dependence. Remarkably, in some direction, the wave encountered a small loop and refracted at a higher speed. All the results provide evidences that the wave was a fast-mode magnetohydrodynamic (MHD) wave. Owing to the close temporal and spatial relationship between the wave and the expanding loops, we believe that the wave was most likely triggered by the fast expansion of the newly formed sigmoidal loops, which evolved into the leading front of the invisible micro-coronal mass ejection.
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 EJECTION ; EIT WAVES ; ACTIVE-REGION ; SOLAR CORONA ; PROPAGATING DISTURBANCE ; SOHO/EIT OBSERVATIONS ; NUMERICAL-SIMULATION ; MORETON WAVES ; YOHKOH SXT ; MHD WAVES
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/2041-8205/753/2/L29/meta
语种	英语
WOS记录号	WOS:000305902700004
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6197]
专题	云南天文台_太阳物理研究组
作者单位	National Astronomical Observatories/Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 GB/T 7714	Zheng RS,Jiang YC,Yang JY,et al. AN EXTREME ULTRAVIOLET WAVE ASSOCIATED WITH A MICRO-SIGMOID ERUPTION[J]. ASTROPHYSICAL JOURNAL LETTERS,2012,753(2):29-35.
APA	Zheng RS.,Jiang YC.,Yang JY.,Bi Y.,Hong JC.,...&Yang B.(2012).AN EXTREME ULTRAVIOLET WAVE ASSOCIATED WITH A MICRO-SIGMOID ERUPTION.ASTROPHYSICAL JOURNAL LETTERS,753(2),29-35.
MLA	Zheng RS,et al."AN EXTREME ULTRAVIOLET WAVE ASSOCIATED WITH A MICRO-SIGMOID ERUPTION".ASTROPHYSICAL JOURNAL LETTERS 753.2(2012):29-35.