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Observation of a reversal of rotation in a sunspot during a solar flare
Bi Y(毕以)1,2; Jiang YC(姜云春)1; Yang JY(杨家艳)1; Hong JC(洪俊超)1; Li HD(李海东)1,2; Yang B(杨波)1; Xu Z(徐喆)1,2
Source PublicationNATURE COMMUNICATIONS
2016-12-13
Volume7Pages:13798-13798
DOI10.1038/ncomms13798
Contribution Rank第1完成单位
Indexed BySCI ; EI
Abstract

The abrupt motion of the photospheric flux during a solar flare is thought to be a back reaction caused by the coronal field reconfiguration. However, the type of motion pattern and the physical mechanism responsible for the back reaction has been uncertain. Here we show that the direction of a sunspot's rotation is reversed during an X1.6 flare using observations from the Helioseismic and Magnetic Imager. A magnetic field extrapolation model shows that the corresponding coronal magnetic field shrinks with increasing magnetic twist density. This suggests that the abrupt reversal of rotation in the sunspot may be driven by a Lorentz torque that is produced by the gradient of twist density from the solar corona to the solar interior. These results support the view that the abrupt reversal in the rotation of the sunspot is a dynamic process responding to shrinkage of the coronal magnetic field during the flare.

Funding ProjectNatural Science Foundation of China[11403098] ; Natural Science Foundation of China[11173058] ; Natural Science Foundation of China[11473065] ; Natural Science Foundation of China[11273056] ; Natural Science Foundation of China[11503081] ; Natural Science Foundation of China[11503082] ; Natural Science Foundation of China[11633008]
Funding OrganizationNatural Science Foundation of China[11403098, 11173058, 11473065, 11273056, 11503081, 11503082, 11633008]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherNATURE PUBLISHING GROUP
Publication PlaceMACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
ISSN2041-1723
URL查看原文
Archive Date2016-12-15
WOS IDWOS:000389670700001
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS Keyword2011 FEBRUARY 15 ; PHOTOSPHERIC MAGNETIC-FIELD ; ACTIVE REGIONS ; LORENTZ FORCE ; X2.2 FLARE ; RAPID CHANGES ; FLUX ROPE ; HELICITY ; RECONNECTION ; EVOLUTION
EI Accession Number5056849
EI Classification Number901Geobase: Related Topics
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9845
Collection太阳物理研究组
Corresponding AuthorBi Y(毕以)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650216, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Bi Y,Jiang YC,Yang JY,et al. Observation of a reversal of rotation in a sunspot during a solar flare[J]. NATURE COMMUNICATIONS,2016,7:13798-13798.
APA Bi Y.,Jiang YC.,Yang JY.,Hong JC.,Li HD.,...&Xu Z.(2016).Observation of a reversal of rotation in a sunspot during a solar flare.NATURE COMMUNICATIONS,7,13798-13798.
MLA Bi Y,et al."Observation of a reversal of rotation in a sunspot during a solar flare".NATURE COMMUNICATIONS 7(2016):13798-13798.
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