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UNWINDING MOTION OF A TWISTED ACTIVE REGION FILAMENT
Yan XL(闫晓理)1,2; Xue ZK(薛志科)1; Liu, JH3; Kong DF(孔德芳)1; Xu, CL4; Yan, XL (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2014-12-10
卷号797期号:1
DOI10.1088/0004-637X/797/1/52
产权排序第1完成单位
收录类别SCI
关键词Sun: Activity Sun: Corona Sun: Filaments Prominences
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.
项目资助者National Science Foundation of China (NSFC) [11373066, 1178016, HZKT201309, XJPT002] ; Yunnan Science Foundation of China [2013FB086, 2013FZ041] ; Talent Project of Western Light of Chinese Academy of Sciences, Key Laboratory of Solar Activity of CAS [KLSA201303, KLSA201212] ; HeBei Natural Science Foundation of China [A2010001942]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2014-12-30
WOS记录号WOS:000345915000052
WOS研究方向Astronomy & Astrophysics
WOS类目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
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被引频次:18[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/4700
专题抚仙湖太阳观测站
通讯作者Yan, XL (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
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
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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,&Yan, XL .(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).
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