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题名:
UNWINDING MOTION OF A TWISTED ACTIVE REGION FILAMENT
作者: Yan XL(闫晓理)1,2; Xue ZK(薛志科)1; Liu, JH3; Kong DF(孔德芳)1; Xu, CL4
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2014-12-10
卷号: 797, 期号:1
DOI: 10.1088/0004-637X/797/1/52
学科分类: Astronomy & Astrophysics
产权排序: 第1完成单位
收录类别: SCI
通讯作者: Yan, XL (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
关键词: Sun: activity ; Sun: corona ; Sun: filaments, prominences
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.
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
原文出处: 查看原文
ISSN号: 0004-637X
文章类型: Article
归档日期: 2014-12-30
WOS标题词: Science & Technology ; Physical Sciences
研究领域[WOS]: Astronomy & Astrophysics
类目[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
WOS记录号: WOS:000345915000052
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内容类型: 期刊论文
URI标识: http://ir.ynao.ac.cn/handle/114a53/4700
Appears in Collections:抚仙湖太阳观测站_期刊论文

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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

Recommended Citation:
Yan XL,Xue ZK,Liu, JH,et al. UNWINDING MOTION OF A TWISTED ACTIVE REGION FILAMENT[J]. ASTROPHYSICAL JOURNAL,2014,797(1).
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