近地磁尾准无碰撞磁重联事件

周国成; 蔡春林; Henri Reme; Andre Balogh; 曹晋滨; 王德驹

doi:10.11728/cjss2003.01.20030104

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近地磁尾准无碰撞磁重联事件

doi: 10.11728/cjss2003.01.20030104 cstr: 32142.14.cjss2003.01.20030104

1. 中国科学院空间科学与应用研究中心北京 100080;
2. Centre d'Etude Spatiale des Rayonnements, France;
3. The Blachett Laboratory, Imperial College, Landon, U.K.

基金项目:

国家自然科学基金(40174042,40074043)

国家杰出青年科学基金(40025413)

双星重大项目资助

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出版历程
- 收稿日期: 2002-09-17
- 修回日期: 2002-10-28

QUASI-COLLISIONLESS MAGNETIC RECONNECTION EVENTS IN THE NEAR-EARTH MAGNETOTAIL

1. Center for Space Science and Applied Research, The Chinese Academy of Sciences, Beijing 100080;
2. Centre d'Etude Spatiale des Rayonnements, France;
3. The Blachett Laboratory, Imperial College, Landon, U.K.

摘要

摘要: 综合分析了ClusterⅡ-C1飞船在2001年9月15日飞越地球磁尾等离子体片区的热离子和磁场观测资料.结果表明,约在0340-0440 UT时间期间,资料多次呈现出较强的尾向离子流(V_XGSM<0),明显的南向磁场分量(B_ZGSM<0),以及明显的晨-昏向磁场分量B_YGSM等特征.由此可以推断,在磁尾等离子体片中,在径向方向X_GSE>-18.6 R_e范围内,可能发生了多次磁重联事件,整个事件持续期约1 h.磁重联事件的观测特征与准无(或半)碰撞磁重联理论的基本图像符合一致,因此这些事件应当是准无碰撞磁重联事件.
- ClusterⅡ飞船 /
- 磁尾 /
- 磁重联事件
Abstract: Hot ion (- 5 eV/e-32 keV/e) and magnetic field data observed by Cluster Ⅱ-C1 CIS/HIS and FGM during the magnetotail plasma sheet crossing on September 15, 2001 are analyzed in this paper. In the interval of 0340-0440 UT, fast tailward ion flows (V_XGSM < 0) were observed, which were associated with the enhancements of southward and dusk-downward magnetic fields (B_ZGSM < 0 and B_YGSM < 0 or > 0). It can be inferred from these observations that magnetic reconnection events took place at X_GSE > -18.6 R_e within the plasma sheet in the interval of 0340-0440 UT on September 15, 2001. The characteristics for these events are consistent with the physical pictures of theory for a quasi-collisionless magnetic reconnection. Hence these events should be called as quasi-collisionless magnetic reconnection events.
- ClusterⅡ spacecraft /
- Geomagnetic tail /
- Magnetic reconnection event