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Sudden Penumbral Reappearance and Umbral Motion Induced by an M7.9 Solar Flare
Xu Z(徐喆)1,2,3; Jiang YC(姜云春)1,3; Yang JY(杨家艳)1,3; Hong JC(洪俊超)1,3; Li HD(李海东)1,2,3
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2017-05-10
Volume840Issue:2
DOI10.3847/2041-8213/aa6fee
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Activity Sun: Flares Sun: Photosphere
Abstract

The sudden flare-related changes of sunspot structures have been recognized as the photospheric responses to the solar eruptions in the corona. In this study, we report two distinctive sunspots variations associated with the flare SOL2015-06-25T08:16 (M7.9). Along the flaring polarity inversion line (PIL), the originally decayed penumbra showed a sudden reappearance, with the horizontal fields increasing in the direction of the penumbral fibrils aligned. On the other hand, the small umbra, where the reappearing penumbra rooted, had a sudden northeastward motion, toward the north part of a large sunspot located in the other side of PIL. Based on the calculation of Lorentz force changes, the area of penumbral reappearance mainly suffered a downward pressure, while the umbra region was dominated by the northeastward lateral pressure. These observations can be well understood as a result of coronal fields contraction, which can be deduced from the nonlinear force-free field extrapolation model. It also confirms the implosion idea that the restructuring of coronal fields could impact the solar surface and interior.

Funding ProjectNatural Science Foundation of China[11473065] ; Natural Science Foundation of China[11333007] ; Natural Science Foundation of China[11403098] ; Natural Science Foundation of China[11503081] ; Natural Science Foundation of China[11633008] ; CAS "Light of West China" Program
Funding OrganizationNatural Science Foundation of China[11473065, 11333007, 11403098, 11503081, 11633008] ; CAS "Light of West China" Program
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
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN2041-8205
URL查看原文
WOS IDWOS:000401097000003
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordPHOTOSPHERIC MAGNETIC-FIELD ; 2011 FEBRUARY 15 ; LORENTZ FORCE ; OBSERVATIONAL EVIDENCE ; SUNSPOT STRUCTURE ; RAPID CHANGES ; X2.2 FLARE ; RECONSTRUCTION ; EVOLUTION ; ENERGY
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10067
Collection太阳物理研究组
Corresponding AuthorXu Z(徐喆)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, China
2.University of Chinese Academy of Sciences, 19A Yuquan Road, Shijingshan District, Beijing 100049, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xu Z,Jiang YC,Yang JY,et al. Sudden Penumbral Reappearance and Umbral Motion Induced by an M7.9 Solar Flare[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,840(2).
APA Xu Z,Jiang YC,Yang JY,Hong JC,&Li HD.(2017).Sudden Penumbral Reappearance and Umbral Motion Induced by an M7.9 Solar Flare.ASTROPHYSICAL JOURNAL LETTERS,840(2).
MLA Xu Z,et al."Sudden Penumbral Reappearance and Umbral Motion Induced by an M7.9 Solar Flare".ASTROPHYSICAL JOURNAL LETTERS 840.2(2017).
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