YNAO OpenIR  > 光纤阵列太阳光学望远镜研究组
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
发表期刊ASTROPHYSICAL JOURNAL
2016-02-01
卷号817期号:2
DOI10.3847/0004-637X/817/2/156
产权排序第1完成单位
收录类别SCI
关键词Sun: Activity Sun: Magnetic Fields Sun: Filaments Prominences
摘要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.
项目资助者National 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
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2016-05-16
WOS记录号WOS:000369437900073
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]POLAR CROWN PROMINENCE ; MAGNETIC-FIELD ; SOLAR FILAMENTS ; DYNAMICS ; RECONNECTION ; THREADS ; VECTOR ; FLARES ; ENERGY
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9336
专题光纤阵列太阳光学望远镜研究组
作者单位1.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
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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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