The Dynamics of AR 12700 in Its Early Emerging Phase. II. Fan-shaped Activities Relevant to Arch Filament Systems
文献类型：期刊论文
| 作者 | Zhong,Sihui1,2; Hou,Yijun1,2; Li,Leping1,2 ; Zhang,Jun1,2; Xiang,Yongyuan3
|
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019-09-09 |
| 卷号 | 882期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Sun: activity Sun: atmosphere Sun: chromosphere Sun: evolution Sun: magnetic fields |
| DOI | 10.3847/1538-4357/ab345c |
| 英文摘要 | Abstract The emergence of active regions (ARs) closely relates to the solar dynamo and dynamical atmospheric phenomena. With high-resolution and long-lasting observations from the New Vacuum Solar Telescope, we report a new dynamic activity phenomenon named “fan-shaped activity (FSA)” in the emerging phase of NOAA AR 12700. The FSAs are clearly observed at Hα wavelengths and are closely related to the dynamics of the adjacent arch filament system (AFS), including thread deformation and material downward motions. On 2018 February 26, the two most representative FSAs appeared around 05:21 UT and 06:03 UT, respectively, and they first ascended and then decayed within around 10 minutes. At the ascending phase, accompanied by the uplifting of an adjacent AFS, each FSA launches up at one end of the AFS and extends for up to ～11 Mm. At the decaying phase, the FSA gradually vanishes, and material downflows toward the other end of the AFS are detected. After checking the evolution of the magnetic fields of AR 12700, we find that each FSA is located between the end of an AFS and an adjacent magnetic patch with the same polarity and launches at the onset of the collision and compression between these two magnetic patches. We propose that the collision lifts up the AFS, and then the initially compact AFS laterally expands, resulting in the formation of FSA. A cartoon model is proposed to depict the activities. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-882-2-AB345C |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/28368]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China zsh@nao.cas.cn, zjun@nao.cas.cn 2.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Zhong,Sihui,Hou,Yijun,Li,Leping,et al. The Dynamics of AR 12700 in Its Early Emerging Phase. II. Fan-shaped Activities Relevant to Arch Filament Systems[J]. The Astrophysical Journal,2019,882(2). |
| APA | Zhong,Sihui,Hou,Yijun,Li,Leping,Zhang,Jun,&Xiang,Yongyuan.(2019).The Dynamics of AR 12700 in Its Early Emerging Phase. II. Fan-shaped Activities Relevant to Arch Filament Systems.The Astrophysical Journal,882(2). |
| MLA | Zhong,Sihui,et al."The Dynamics of AR 12700 in Its Early Emerging Phase. II. Fan-shaped Activities Relevant to Arch Filament Systems".The Astrophysical Journal 882.2(2019). |
入库方式： OAI收割
来源：国家天文台
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