A Giant Dark Channel across the Solar Equator Consisting of Two Filament Channels with Different Chiralities
文献类型：期刊论文
| 作者 | Song,Zhiping1; Hou,Yijun2,3; Zhang,Jun2,3
|
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019-01-17 |
| 卷号 | 871期号:1 |
| 关键词 | Sun: atmosphere Sun: filaments, prominences Sun: magnetic fields Sun: UV radiation |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aaf426 |
| 英文摘要 | Abstract Solar filaments are the largest magnetic structure that can be physically traced to the chromosphere. The structure and evolution of solar filaments are important for our understanding of solar atmosphere physics. In this work, we investigate a giant dark channel, which consists of two filament channels with different chiralities, crossing the solar equator. From 2016 April 22 to April 27, this giant dark channel occupied the solar disk. Within this giant channel, a filament channel with dextral chirality was detected in the northern hemisphere, and another filament channel with sinistral chirality was observed in the southern hemisphere. At the junction of the two filament channels, a cusp structure was observed associated with active region (AR) 12532 near the solar equator. The extrapolated three-dimensional magnetic fields reveal that this cusp structure was composed of two sets of field lines belonging to two different filament channels and was rooted in the AR positive-polarity fields. In addition, dark material flows from filaments in the two channels to the cusp structure were detected as well as flux emergence and cancellation around the cusp footpoints. On 2016 May 21, after a solar rotation, the cusp structure disappeared, and the giant dark channel broke in the middle, where another AR, 12546, emerged completely. We propose that the magnetic flux emergence and cancellation around the cusp region resulted in the disappearance of the cusp structure and the breaking of the giant dark channel. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-871-1-AAF426 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/24649]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.School of Physics and Materials Science, Anhui University, Hefei 230601, People's Republic of China 2.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of Chinayijunhou@nao.cas.cn, zjun@nao.cas.cn 3.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Song,Zhiping,Hou,Yijun,Zhang,Jun. A Giant Dark Channel across the Solar Equator Consisting of Two Filament Channels with Different Chiralities[J]. The Astrophysical Journal,2019,871(1). |
| APA | Song,Zhiping,Hou,Yijun,&Zhang,Jun.(2019).A Giant Dark Channel across the Solar Equator Consisting of Two Filament Channels with Different Chiralities.The Astrophysical Journal,871(1). |
| MLA | Song,Zhiping,et al."A Giant Dark Channel across the Solar Equator Consisting of Two Filament Channels with Different Chiralities".The Astrophysical Journal 871.1(2019). |
入库方式： OAI收割
来源：国家天文台
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