SLIPPING MAGNETIC RECONNECTION OF FLUX-ROPE STRUCTURES AS A PRECURSOR TO AN ERUPTIVE X-CLASS SOLAR FLARE

	SLIPPING MAGNETIC RECONNECTION OF FLUX-ROPE STRUCTURES AS A PRECURSOR TO AN ERUPTIVE X-CLASS SOLAR FLARE
	Li, Ting1,2 ; Yang, Kai 3,4; Hou, Yijun 1,2; Zhang, Jun1,2
刊名	ASTROPHYSICAL JOURNAL
	2016-10-20
卷号	830 期号:2
关键词	magnetic reconnection Sun: flares Sun: transition region Sun: UV radiation
英文摘要	We present the quasi-periodic slipping motion of flux-rope structures prior to the onset of an eruptive X-class flare on 2015 March 11, obtained by the Interface Region Imaging Spectrograph and the Solar Dynamics Observatory. The slipping motion occurred at the north part of the flux rope and seemed to successively peel off the flux rope. The speed of the slippage was 30-40 km s(-1), with an average period of 130 +/- 30 s. The Si IV lambda 1402.77 line showed a redshift of 10-30 km s(-1) and a line width of 50-120 km s(-1) at the west legs of slipping structures, indicative of reconnection downflow. The slipping motion lasted about 40 minutes, and the flux rope started to rise up slowly at the late stage of the slippage. Then an X2.1 flare was initiated, and the flux rope was impulsively accelerated. One of the flare ribbons swept across a negative-polarity sunspot, and the penumbral segments of the sunspot decayed rapidly after the flare. We studied the magnetic topology at the flaring region, and the results showed the existence of a twisted flux rope, together with quasi-separatrix layer (QSL) structures binding the flux rope. Our observations imply that quasi-periodic slipping magnetic reconnection occurs along the flux-rope-related QSLs in the preflare stage, which drives the later eruption of the flux rope and the associated flare.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	REGION-IMAGING-SPECTROGRAPH ; QUASI-SEPARATRIX LAYERS ; DYNAMICS-OBSERVATORY SDO ; CORONAL MASS EJECTIONS ; ACTIVE-REGION ; CHROMOSPHERIC EVAPORATION ; RUNNING RECONNECTION ; NULL POINTS ; FILAMENT ; TOPOLOGY
收录类别	SCI
语种	英语
WOS记录号	WOS:000386583400004
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6877]
专题	国家天文台_太阳物理研究部
作者单位	1.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Jiangsu, Peoples R China 4.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210023, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Li, Ting,Yang, Kai,Hou, Yijun,et al. SLIPPING MAGNETIC RECONNECTION OF FLUX-ROPE STRUCTURES AS A PRECURSOR TO AN ERUPTIVE X-CLASS SOLAR FLARE[J]. ASTROPHYSICAL JOURNAL,2016,830(2).
APA	Li, Ting,Yang, Kai,Hou, Yijun,&Zhang, Jun.(2016).SLIPPING MAGNETIC RECONNECTION OF FLUX-ROPE STRUCTURES AS A PRECURSOR TO AN ERUPTIVE X-CLASS SOLAR FLARE.ASTROPHYSICAL JOURNAL,830(2).
MLA	Li, Ting,et al."SLIPPING MAGNETIC RECONNECTION OF FLUX-ROPE STRUCTURES AS A PRECURSOR TO AN ERUPTIVE X-CLASS SOLAR FLARE".ASTROPHYSICAL JOURNAL 830.2(2016).