| KINEMATICS AND FINE STRUCTURE OF AN UNWINDING POLAR JET OBSERVED BY THE SOLAR DYNAMIC OBSERVATORY/ATMOSPHERIC IMAGING ASSEMBLY | |
Shen YD(申远灯)1,2,3 ; Liu Y(刘煜)1,3; Su, JT3,4; Ibrahim, A5; Shen, YD (reprint author), Chinese Acad Sci, Natl Astron Observ Yunnan Observ, Kunming 650011, Peoples R China.
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| 发表期刊 | ASTROPHYSICAL JOURNAL LETTERS
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| 2011-07-10 | |
| 卷号 | 735期号:2 |
| DOI | 10.1088/2041-8205/735/2/L43 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Sun: Activity Sun: Chromosphere Sun: Corona Planets And Satellites: Magnetic Fields |
| 摘要 | We present an observational study of the kinematics and fine structure of an unwinding polar jet, with high temporal and spatial observations taken by the Atmospheric Imaging Assembly on board the Solar Dynamic Observatory and the Solar Magnetic Activity Research Telescope. During the rising period, the shape of the jet resembled a cylinder with helical structures on the surface, while the mass of the jet was mainly distributed on the cylinder's shell. In the radial direction, the jet expanded successively at its western side and underwent three distinct phases: the gradually expanding phase, the fast expanding phase, and the steady phase. Each phase lasted for about 12 minutes. The angular speed of the unwinding motion of the jet and the twist transferred into the outer corona during the eruption are estimated to be 11.1 x 10(-3) rad s(-1) (period = 564 s) and 1.17-2.55 turns (or 2.34-5.1 pi), respectively. On the other hand, by calculating the azimuthal component of the magnetic field in the jet and comparing the free energy stored in the non-potential magnetic field with the jet's total energy, we find that the non-potential magnetic field in the jet is enough to supply the energy for the ejection. These new observational results strongly support the scenario that the jets are driven by the magnetic twist, which is stored in the twisted closed field of a small bipole, and released through magnetic reconnection between the bipole and its ambient open field. |
| 项目资助者 | NSFC [10933003, 11078004, 11073050] ; MOST [2011CB811400] ; Key Laboratory of Solar Activity of the National Astronomical Observatories of the Chinese Academy of Sciences [KLSA2011-14] |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 2041-8205 |
| URL | 查看原文 |
| 归档日期 | 2011-11-26 |
| WOS记录号 | WOS:000293138000019 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | CORONAL MASS EJECTIONS ; EMERGING FLUX ; SURGE ; REGION |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/7176 |
| 专题 | 选址与日冕观测组 |
| 通讯作者 | Shen, YD (reprint author), Chinese Acad Sci, Natl Astron Observ Yunnan Observ, Kunming 650011, Peoples R China. |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Science, Beijing 100012, China 4.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 5.Physics and Astronomy Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Shen YD,Liu Y,Su, JT,et al. KINEMATICS AND FINE STRUCTURE OF AN UNWINDING POLAR JET OBSERVED BY THE SOLAR DYNAMIC OBSERVATORY/ATMOSPHERIC IMAGING ASSEMBLY[J]. ASTROPHYSICAL JOURNAL LETTERS,2011,735(2). |
| APA | Shen YD,Liu Y,Su, JT,Ibrahim, A,&Shen, YD .(2011).KINEMATICS AND FINE STRUCTURE OF AN UNWINDING POLAR JET OBSERVED BY THE SOLAR DYNAMIC OBSERVATORY/ATMOSPHERIC IMAGING ASSEMBLY.ASTROPHYSICAL JOURNAL LETTERS,735(2). |
| MLA | Shen YD,et al."KINEMATICS AND FINE STRUCTURE OF AN UNWINDING POLAR JET OBSERVED BY THE SOLAR DYNAMIC OBSERVATORY/ATMOSPHERIC IMAGING ASSEMBLY".ASTROPHYSICAL JOURNAL LETTERS 735.2(2011). |
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| KINEMATICS AND FINE （758KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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