THE EVOLUTION OF THE ELECTRIC CURRENT DURING THE FORMATION AND ERUPTION OF ACTIVE-REGION FILAMENTS
文献类型：期刊论文
| 作者 | 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
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2016-02-01 |
| 卷号 | 817期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Sun: activity Sun: filaments, prominences Sun: magnetic fields |
| 产权排序 | 第一完成单位 |
| 英文摘要 | 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. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | POLAR CROWN PROMINENCE ; MAGNETIC-FIELD ; SOLAR FILAMENTS ; DYNAMICS ; RECONNECTION ; THREADS ; VECTOR ; FLARES ; ENERGY |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.3847/0004-637X/817/2/156/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000369437900073 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9336]  |
| 专题 | 云南天文台_光纤阵列太阳光学望远镜研究组 云南天文台_抚仙湖太阳观测站 |
| 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 |
| 推荐引用方式 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). |
入库方式： OAI收割
来源：云南天文台
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