QUASI-PERIODIC SLIPPING MAGNETIC RECONNECTION DURING AN X-CLASS SOLAR FLARE OBSERVED BY THE SOLAR DYNAMICS OBSERVATORY AND INTERFACE REGION IMAGING SPECTROGRAPH

	QUASI-PERIODIC SLIPPING MAGNETIC RECONNECTION DURING AN X-CLASS SOLAR FLARE OBSERVED BY THE SOLAR DYNAMICS OBSERVATORY AND INTERFACE REGION IMAGING SPECTROGRAPH
	Li, Ting; Zhang, Jun
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2015-05-01
卷号	804 期号:1
关键词	magnetic reconnection Sun: filaments, prominences Sun: flares
英文摘要	We first report the quasi-periodic slipping motion of flare loops during an eruptive X-class flare on 2014 September 10. The slipping motion was investigated at a specific location along one of the two ribbons and can be observed throughout the impulsive phase of the flare. The apparent slipping velocity was 20-110 km s(-1), and the associated period was 3-6 minutes. The footpoints of flare loops appeared as small-scale bright knots observed in 1400 angstrom, corresponding to fine structures of the flare ribbon. These bright knots were observed to move along the southern part of the longer ribbon and also exhibited a quasi-periodic pattern. The Si IV 1402.77 angstrom line was redshifted by 30-50 km s(-1) at the locations of moving knots with a similar to 40-60 km s(-1) line width, larger than other sites of the flare ribbon. We suggest that the quasi-periodic slipping reconnection is involved in this process and the redshift at the bright knots is probably indicative of reconnection downflow. The emission line of Si IV at the northern part of the longer ribbon also exhibited obvious redshifts of about 10-70 km s(-1) in the impulsive phase of the flare, with the redshifts at the outer edges of the ribbon larger than those in the middle. The redshift velocities at post-flare loops reached about 80-100 km s(-1) in the transition region.
收录类别	SCI
语种	英语
WOS记录号	WOS:000353819400008
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5770]
专题	国家天文台_太阳物理研究部
作者单位	Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Li, Ting,Zhang, Jun. QUASI-PERIODIC SLIPPING MAGNETIC RECONNECTION DURING AN X-CLASS SOLAR FLARE OBSERVED BY THE SOLAR DYNAMICS OBSERVATORY AND INTERFACE REGION IMAGING SPECTROGRAPH[J]. ASTROPHYSICAL JOURNAL LETTERS,2015,804(1).
APA	Li, Ting,&Zhang, Jun.(2015).QUASI-PERIODIC SLIPPING MAGNETIC RECONNECTION DURING AN X-CLASS SOLAR FLARE OBSERVED BY THE SOLAR DYNAMICS OBSERVATORY AND INTERFACE REGION IMAGING SPECTROGRAPH.ASTROPHYSICAL JOURNAL LETTERS,804(1).
MLA	Li, Ting,et al."QUASI-PERIODIC SLIPPING MAGNETIC RECONNECTION DURING AN X-CLASS SOLAR FLARE OBSERVED BY THE SOLAR DYNAMICS OBSERVATORY AND INTERFACE REGION IMAGING SPECTROGRAPH".ASTROPHYSICAL JOURNAL LETTERS 804.1(2015).