UNWINDING MOTION OF A TWISTED ACTIVE REGION FILAMENT

	UNWINDING MOTION OF A TWISTED ACTIVE REGION FILAMENT
	Yan XL(闫晓理)1,2 ; Xue ZK(薛志科)1 ; Liu, JH 3; Kong DF(孔德芳)1 ; Xu, CL4
刊名	ASTROPHYSICAL JOURNAL
	2014-12-10
卷号	797 期号:1
关键词	Sun: activity Sun: corona Sun: filaments, prominences
ISSN号	0004-637X
通讯作者	Yan, XL (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	To better understand the structures of active region filaments and the eruption process, we study an active region filament eruption in active region NOAA 11082 in detail on 2010 June 22. Before the filament eruption, the opposite unidirectional material flows appeared in succession along the spine of the filament. The rising of the filament triggered two B-class flares at the upper part of the filament. As the bright material was injected into the filament from the sites of the flares, the filament exhibited a rapid uplift accompanying the counterclockwise rotation of the filament body. From the expansion of the filament, we can see that the filament consisted of twisted magnetic field lines. The total twist of the filament is at least 5 pi obtained by using a time slice method. According to the morphology change during the filament eruption, it is found that the active region filament was a twisted flux rope and its unwinding motion was like a solar tornado. We also find that there was a continuous magnetic helicity injection before and during the filament eruption. It is confirmed that magnetic helicity can be transferred from the photosphere to the filament. Using the extrapolated potential fields, the average decay index of the background magnetic fields over the filament is 0.91. Consequently, these findings imply that the mechanism of solar filament eruption could be due to the kink instability and magnetic helicity accumulation.
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 ; MAGNETIC-FLUX ROPE ; KINK INSTABILITY ; SOLAR PROMINENCES ; ROTATIONAL MOTION ; TRIGGER MECHANISM ; SUNSPOT ROTATION ; EMERGING FLUX ; ERUPTION ; FLARES
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-637X/797/1/52/meta
语种	英语
WOS记录号	WOS:000345915000052
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4700]
专题	云南天文台_抚仙湖太阳观测站
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China 2.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 3.Department of Physics, Shijiazhuang University, Shijiazhuang 050035, China 4.Yunnan Normal University, Kunming 650092, China
推荐引用方式 GB/T 7714	Yan XL,Xue ZK,Liu, JH,et al. UNWINDING MOTION OF A TWISTED ACTIVE REGION FILAMENT[J]. ASTROPHYSICAL JOURNAL,2014,797(1).
APA	Yan XL,Xue ZK,Liu, JH,Kong DF,&Xu, CL.(2014).UNWINDING MOTION OF A TWISTED ACTIVE REGION FILAMENT.ASTROPHYSICAL JOURNAL,797(1).
MLA	Yan XL,et al."UNWINDING MOTION OF A TWISTED ACTIVE REGION FILAMENT".ASTROPHYSICAL JOURNAL 797.1(2014).