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THE EVOLUTION OF THE ELECTRIC CURRENT DURING THE FORMATION AND ERUPTION OF ACTIVE-REGION FILAMENTS
Wang JC(王金成)1,2; Yan XL(闫晓理)1,3; Qu ZQ(屈中权)1; Xue ZK(薛志科)1; Xiang YY(向永源)1; Li H(李昊)1,2
Source PublicationASTROPHYSICAL JOURNAL
2016-02-01
Volume817Issue:2
DOI10.3847/0004-637X/817/2/156
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Activity Sun: Magnetic Fields Sun: Filaments Prominences
Abstract

We present a comprehensive study of the electric current related to the formation and eruption of active region filaments in NOAA AR 11884. The vertical current on the solar surface was investigated by using vector magnetograms (VMs) observed by HMI on board the Solar Dynamics Observatory. To obtain the electric current along the filament's axis, we reconstructed the magnetic fields above the photosphere by using nonlinear force-free field extrapolation based on photospheric VMs. Spatio-temporal evolutions of the vertical current on the photospheric surface and the horizontal current along the filament's axis were studied during the long-term evolution and eruption-related period, respectively. The results show that the vertical currents of the entire active region behaved with a decreasing trend and the magnetic fields also kept decreasing during the long-term evolution. For the eruption-related evolution, the mean transverse field strengths decreased before two eruptions and increased sharply after two eruptions in the vicinity of the polarity inversion lines underneath the filament. The related vertical current showed different behaviors in two of the eruptions. On the other hand, a very interesting feature was found: opposite horizontal currents with respect to the current of the filament's axis appeared and increased under the filament before the eruptions and disappeared after the eruptions. We suggest that these opposite currents were carried by the new flux emerging from the photosphere bottom and might be the trigger mechanism for these filament eruptions.

Funding ProjectNational Science Foundation of China (NSFC) [11373066] ; National Science Foundation of China (NSFC) [11203077] ; National Science Foundation of China (NSFC) [11373065] ; Yunnan Science Foundation of China[2013FB086] ; Youth Innovation Promotion Association CAS[2011056] ; Foundation of Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University) ; CAS "Light of West China" Program
Funding OrganizationNational Science Foundation of China (NSFC) [11373066, 11203077, 11373065] ; Yunnan Science Foundation of China[2013FB086] ; Youth Innovation Promotion Association CAS[2011056] ; Foundation of Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University) ; 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
ISSN0004-637X
URL查看原文
Archive Date2016-05-16
WOS IDWOS:000369437900073
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordPOLAR CROWN PROMINENCE ; MAGNETIC-FIELD ; SOLAR FILAMENTS ; DYNAMICS ; RECONNECTION ; THREADS ; VECTOR ; FLARES ; 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/114a53/9336
Collection光纤阵列太阳光学望远镜研究组
Corresponding AuthorWang JC(王金成)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Graduate School of University of Chinese Academy of Sciences, Yuquan Road, Shijingshang Block Beijing 100049, China
3.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education Nanjing 210093, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang JC,Yan XL,Qu ZQ,et al. THE EVOLUTION OF THE ELECTRIC CURRENT DURING THE FORMATION AND ERUPTION OF ACTIVE-REGION FILAMENTS[J]. ASTROPHYSICAL JOURNAL,2016,817(2).
APA Wang JC,Yan XL,Qu ZQ,Xue ZK,Xiang YY,&Li H.(2016).THE EVOLUTION OF THE ELECTRIC CURRENT DURING THE FORMATION AND ERUPTION OF ACTIVE-REGION FILAMENTS.ASTROPHYSICAL JOURNAL,817(2).
MLA Wang JC,et al."THE EVOLUTION OF THE ELECTRIC CURRENT DURING THE FORMATION AND ERUPTION OF ACTIVE-REGION FILAMENTS".ASTROPHYSICAL JOURNAL 817.2(2016).
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