Method for inferring the axis orientation of cylindrical magnetic flux rope based on single-point measurement
文献类型：期刊论文
| 作者 | Rong, Z. J.1,2; Wan, W. X.1,2; Shen, C.3; Zhang, T. L.4,5; Lui, A. T. Y.6; Wang, Yuming4; Dunlop, M. W.7; Zhang, Y. C.3; Zong, Q. -G.8 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2013 |
| 卷号 | 118期号:1页码:271-283 |
| ISSN号 | 2169-9402 |
| 关键词 | Flux ropes Plasmoid Flux transfer events Magnetic cloud Magnetic reconnection |
| 通讯作者 | 北京8701信箱 |
| 中文摘要 | We develop a new simple method for inferring the orientation of a magnetic flux rope, which is assumed to be a time-independent cylindrically symmetric structure via the direct single-point analysis of magnetic field structure. The model tests demonstrate that, for the cylindrical flux rope regardless of whether it is force-free or not, the method can consistently yield the axis orientation of the flux rope with higher accuracy and stability than the minimum variance analysis of the magnetic field and the Grad-Shafranov reconstruction technique. Moreover, the radial distance to the axis center and the current density can also be estimated consistently. Application to two actual flux transfer events observed by the four satellites of the Cluster mission demonstrates that the method is more appropriate to be used for the inner part of flux rope, which might be closer to the cylindrical structure, showing good agreement with the results obtained from the optimal Grad-Shafranov reconstruction and the least squares technique of Faraday's law, but fails to produce such agreement for the outer satellite that grazes the flux rope. Therefore, the method must be used with caution. |
| 英文摘要 | We develop a new simple method for inferring the orientation of a magnetic flux rope, which is assumed to be a time-independent cylindrically symmetric structure via the direct single-point analysis of magnetic field structure. The model tests demonstrate that, for the cylindrical flux rope regardless of whether it is force-free or not, the method can consistently yield the axis orientation of the flux rope with higher accuracy and stability than the minimum variance analysis of the magnetic field and the Grad-Shafranov reconstruction technique. Moreover, the radial distance to the axis center and the current density can also be estimated consistently. Application to two actual flux transfer events observed by the four satellites of the Cluster mission demonstrates that the method is more appropriate to be used for the inner part of flux rope, which might be closer to the cylindrical structure, showing good agreement with the results obtained from the optimal Grad-Shafranov reconstruction and the least squares technique of Faraday's law, but fails to produce such agreement for the outer satellite that grazes the flux rope. Therefore, the method must be used with caution. Citation: Rong, Z. J., W. X. Wan, C. Shen, T. L. Zhang, A. T. Y. Lui, Y. Wang, M. W. Dunlop, Y. C. Zhang, and Q.-G. Zong (2013), Method for inferring the axis orientation of cylindrical magnetic flux rope based on single-point measurement, J. Geophys. Res. Space Physics, 118, 271-283, doi:10.1029/2012JA018079. |
| 学科主题 | 空间物理 |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1533]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Ionospher Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100029, Peoples R China 4.Univ Sci & Technol China, Dept Geophys & Planetary Sci, Key Lab Basic Plasma Phys, Hefei 230026, Peoples R China 5.Austrian Acad Sci, Space Res Inst, A-8010 Graz, Austria 6.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20707 USA 7.Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England 8.Peking Univ, Dept Geophys, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Rong, Z. J.,Wan, W. X.,Shen, C.,et al. Method for inferring the axis orientation of cylindrical magnetic flux rope based on single-point measurement[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2013,118(1):271-283. |
| APA | Rong, Z. J..,Wan, W. X..,Shen, C..,Zhang, T. L..,Lui, A. T. Y..,...&Zong, Q. -G..(2013).Method for inferring the axis orientation of cylindrical magnetic flux rope based on single-point measurement.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,118(1),271-283. |
| MLA | Rong, Z. J.,et al."Method for inferring the axis orientation of cylindrical magnetic flux rope based on single-point measurement".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 118.1(2013):271-283. |
入库方式： OAI收割
来源：国家空间科学中心
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