| 利用Grad-Shafranov重构方法研究磁尾通量绳的特征参量和内部结构 |
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| 引用本文： | 张永存,沈超,刘振兴.利用Grad-Shafranov重构方法研究磁尾通量绳的特征参量和内部结构[J].物理学报,2011,60(6):65201-065201. |
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| 作者姓名： | 张永存 沈超 刘振兴 |
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| 作者单位： | 中国科学院空间科学与应用研究中心空间天气学国家重点实验室,北京 100190 |
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| 基金项目： | 国家自然科学基金青年科学基金(批准号:40804033)、国家自然科学基金(批准号:40974101)、国家自然科学基金重点项目(批准号:40731054)、国家重点基础研究发展计划(批准号:2011CB811404)和国家重点实验室专项基金资助的课题. |
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| 摘 要： | 2009年2月21日THEMIS-C卫星在磁尾X=-15.7RE(RE为地球半径,1RE=6371 km)观测到典型的磁通量绳事件.采用Grad-Shafranov 重构技术研究该磁通量绳的特性、内部磁场和电流结构.研究表明,磁通量绳不变轴位于GSM(geocentric solar magnetospheric coordinates)坐标为(-0.3975,0.8905,0.221
关键词：
磁尾
磁通量绳
Grad-Shafranov重构
多X线重联
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| 关 键 词： | 磁尾 磁通量绳 Grad-Shafranov重构 多X线重联 |
| 收稿时间： | 2010-03-21 |
| 修稿时间： | 9/7/2010 12:00:00 AM |
Characteristics and structure of magnetotail flux rope recovered from Grad-Shafranov method |
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| Zhang Yong-Cun,Shen Chao,Liu Zhen-Xing.Characteristics and structure of magnetotail flux rope recovered from Grad-Shafranov method[J].Acta Physica Sinica,2011,60(6):65201-065201. |
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| Authors: | Zhang Yong-Cun Shen Chao Liu Zhen-Xing |
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| Institution: | State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China;State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China;State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | On 21 February 2009, THEMIS-C satellite observed the classical signal of magnetic flux rope at magnetotail of X=-15.7RE.We take the method of Grad-Shafranov reconstruction to investigate the characteristics and structure of magnetotail flux rope. The results give the characteristic physics parameters such as the invariant axis direction, the cross scale length, the magnetic flux in flux rope, etc. With no constraint from model on shape of the flux rope, we reconstruct the distribution of magnetic field and electric current density in the cross section of magnetic flux rope at magnetotail. Our results show that the magnetic field in the central region of magnetic flux rope can be described as being force-free, while with the increase of radial distance, the fields display no force-free feature in the region where the magnetic fields deviate from the axial symmetric distribution. |
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| Keywords: | magnetotail magnetic flux rope Grad-Shafranov reconstruction multiple X-line reconnection |
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