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KINK INSTABILITY EVIDENCED BY ANALYZING THE LEG ROTATION OF A FILAMENT
Yan XL(闫晓理)1,2; Xue ZK(薛志科)1; Liu, JH3; Ma L(马琳)1; Kong DF(孔德芳)1; Qu ZQ(屈中权)1; Li, Z2; Yan, XL (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2014-02-20
卷号782期号:2
DOI10.1088/0004-637X/782/2/67
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Kink instability is a possible mechanism for solar filament eruption. However, it is very difficult to directly measure the twist of the solar filament from observation. In this paper, we measured the twist of a solar filament by analyzing its leg rotation. An inverse S-shaped filament in the active region NOAA 11485 was observed by the Atmospheric Imaging Assembly of the Solar Dynamics Observatory on 2012 May 22. During its eruption, the leg of the filament exhibited a significant rotation motion. The 304 angstrom images were used to uncurl the circles, the centers of which are the axis of the filament's leg. The result shows that the leg of the filament rotated up to about 510 degrees (about 2.83 pi) around the axis of the filament within 23 minutes. The maximal rotation speed reached 100 degrees/minute (about 379.9 km s(-1) at radius 18 ''), which is the fastest rotation speed reported. We also calculated the decay index along the polarity inversion line in this active region and found that the decline of the overlying field with height is not fast enough to trigger the torus instability. According to the kink instability condition, this indicates that the kink instability is the trigger mechanism for the solar filament eruption.
项目资助者National Science Foundation of China (NSFC) [11373066, 11373065, 11178016] ; Yunnan Science Foundation of China [2013FB086] ; Chinese Academy of Sciences ; National Basic Research Program of China 973 [G2011CB811400] ; HeBei Natural Science Foundation of China [A2010001942] ; Foundation of Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University)
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2014-02-26
WOS记录号WOS:000334584700009
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CORONAL MASS EJECTION ; SOLAR-FLARES ; FLUX ROPES ; SUNSPOT ROTATION ; MAGNETIC-FIELDS ; PROMINENCES ; STABILITY ; ERUPTION ; LOOPS ; EVOLUTION
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被引频次:19[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/114a53/4709
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 Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, China
3.Department of Physics, Shijiazhuang University, Shijiazhuang 050035, China
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GB/T 7714
Yan XL,Xue ZK,Liu, JH,et al. KINK INSTABILITY EVIDENCED BY ANALYZING THE LEG ROTATION OF A FILAMENT[J]. ASTROPHYSICAL JOURNAL,2014,782(2).
APA Yan XL.,Xue ZK.,Liu, JH.,Ma L.,Kong DF.,...&Yan, XL .(2014).KINK INSTABILITY EVIDENCED BY ANALYZING THE LEG ROTATION OF A FILAMENT.ASTROPHYSICAL JOURNAL,782(2).
MLA Yan XL,et al."KINK INSTABILITY EVIDENCED BY ANALYZING THE LEG ROTATION OF A FILAMENT".ASTROPHYSICAL JOURNAL 782.2(2014).
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