PARTIAL ERUPTION OF A FILAMENT WITH TWISTING NON-UNIFORM FIELDS
文献类型：期刊论文
| 作者 | Bi Y(毕以)1,2 ; Jiang YC(姜云春)1; Yang JY(杨家艳)1; Xiang YY(向永源)1; Cai YF(蔡云芳)1; Liu WW(刘威卫)1
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2015-05-20 |
| 卷号 | 805期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Sun: filaments Sun: magnetic fields prominences |
| 通讯作者 | Bi, Y (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 产权排序 | 第一完成单位 |
| 英文摘要 | The eruption of a filament in a kinklike fashion is often regarded as a signature of kink instability. However, the kink instability threshold for the filament's magnetic structure is not widely understood. Using Ha observations from the New Vacuum Solar Telescope, we present a partial eruptive filament. During the eruption, the filament thread appeared to split from its middle and to break out in a kinklike fashion. In this period, the remaining filament material stayed below and erupted without the kinking motion later on. The coronal magnetic field lines associated with the filament are obtained from nonlinear force-free field extrapolations using the twelve-minute-cadence vector magnetograms of the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamic Observatory. We studied the extrapolated field lines passing through the magnetic dips which are in good agreement with the observed filament. The field lines are non-uniformly twisted and appear to be composed of two twisted flux ropes winding around each other. One of them has a higher twist than the other, and the flux rope with the higher twist has its dips aligned with the kinking eruptive thread at the beginning of its eruption. Before the eruption, moreover, the flux rope with the higher twist was found to expand with an approximately constant field twist. In addition, the helicity flux maps deduced from the HMI magnetograms show that some helicity is injected into the overlying magnetic arcade, but no significant helicity is injected into the flux ropes. Accordingly, we suggest that the highly twisted flux rope became kink unstable when the instability threshold declined with the expansion of the flux rope. |
| 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] | CORONAL MAGNETIC-FIELDS ; FLUX ROPE ; KINK INSTABILITY ; SOLAR FILAMENT ; MASS EJECTIONS ; OBSERVATIONAL EVIDENCE ; VECTOR MAGNETOGRAPH ; RECONSTRUCTION ; HELICITY ; ROTATION |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-637X/805/1/48/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000354991300048 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/6268]  |
| 专题 | 云南天文台_太阳物理研究组 云南天文台_抚仙湖太阳观测站 |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China 2.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China |
| 推荐引用方式 GB/T 7714 | Bi Y,Jiang YC,Yang JY,et al. PARTIAL ERUPTION OF A FILAMENT WITH TWISTING NON-UNIFORM FIELDS[J]. ASTROPHYSICAL JOURNAL,2015,805(1). |
| APA | Bi Y,Jiang YC,Yang JY,Xiang YY,Cai YF,&Liu WW.(2015).PARTIAL ERUPTION OF A FILAMENT WITH TWISTING NON-UNIFORM FIELDS.ASTROPHYSICAL JOURNAL,805(1). |
| MLA | Bi Y,et al."PARTIAL ERUPTION OF A FILAMENT WITH TWISTING NON-UNIFORM FIELDS".ASTROPHYSICAL JOURNAL 805.1(2015). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。