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THE FORMATION AND MAGNETIC STRUCTURES OF ACTIVE-REGION FILAMENTS OBSERVED BY NVST, SDO, AND HINODE
Yan,X. L.1,2; Xue,Z. K.1; Pan,G. M.3; Wang,J. C.1; Xiang,Y. Y.1; Kong,D. F.1; Yang,L. H.1
2015-07-28
Source PublicationThe Astrophysical Journal Supplement Series
ISSN0067-0049
Volume219Issue:2
AbstractABSTRACT To better understand the properties of solar active-region filaments, we present a detailed study on the formation and magnetic structures of two active-region filaments in active region NOAA 11884 during a period of four days. It is found that the shearing motion of the opposite magnetic polarities and the rotation of the small sunspots with negative polarity play an important role in the formation of two active-region filaments. During the formation of these two active-region filaments, one foot of the filaments was rooted in a small sunspot with negative polarity. The small sunspot rotated not only around another small sunspot with negative polarity, but also around the center of its umbra. By analyzing the nonlinear force-free field extrapolation using the vector magnetic fields in the photosphere, twisted structures were found in the two active-region filaments prior to their eruptions. These results imply that the magnetic fields were dragged by the shearing motion between opposite magnetic polarities and became more horizontal. The sunspot rotation twisted the horizontal magnetic fields and finally formed the twisted active-region filaments.
KeywordSun: activity Sun: filaments, prominences Sun: flares Sun: magnetic fields Sun: photosphere sunspots
DOI10.1088/0067-0049/219/2/17
Language英语
WOS IDIOP:0067-0049-219-2-17
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/36183
Collection中国科学院国家天文台
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
2.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
3.College of Mathematics Physics and Information Engineering, Jiaxing University, Jiaxing 314001, China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yan,X. L.,Xue,Z. K.,Pan,G. M.,et al. THE FORMATION AND MAGNETIC STRUCTURES OF ACTIVE-REGION FILAMENTS OBSERVED BY NVST, SDO, AND HINODE[J]. The Astrophysical Journal Supplement Series,2015,219(2).
APA Yan,X. L..,Xue,Z. K..,Pan,G. M..,Wang,J. C..,Xiang,Y. Y..,...&Yang,L. H..(2015).THE FORMATION AND MAGNETIC STRUCTURES OF ACTIVE-REGION FILAMENTS OBSERVED BY NVST, SDO, AND HINODE.The Astrophysical Journal Supplement Series,219(2).
MLA Yan,X. L.,et al."THE FORMATION AND MAGNETIC STRUCTURES OF ACTIVE-REGION FILAMENTS OBSERVED BY NVST, SDO, AND HINODE".The Astrophysical Journal Supplement Series 219.2(2015).
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