Thin energetic O+ layer embedded in the magnetotail reconnection current sheet observed by Cluster

被引：5
|
作者：
Wu, T. [1 ]
Fu, S. Y. [1 ]
Zong, Q. G. [1 ]
Sun, W. J. [1 ,2 ]
Cui, Y. B. [1 ]
Zhao, D. [1 ]
Guo, R. L. [1 ,2 ]
Zhao, S. J. [1 ]
Wang, Y. F. [1 ]
机构：
[1] Peking Univ, Inst Space Phys & Appl Technol, Sch Earth & Space Sci, Beijing, Peoples R China
[2] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
来源：
GEOPHYSICAL RESEARCH LETTERS | 2016年 / 43卷 / 22期
关键词：
PLASMA SHEET; IONS; MAGNETOSPHERE; MODEL;
D O I：
10.1002/2016GL071184
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
In the classical picture of the magnetotail current sheet, the current carriers are mainly ions that undergo nonadiabatic motions. Oxygen ions could contribute a thicker current sheet than the protons due to their large gyroradii. In this paper, however, we report a thin energetic O+ layer embedded in the magnetotail proton current sheet observed by Cluster on 11 October 2001. The thickness of the O+ layer is estimated to be smaller than the half thickness of the local current sheet. And the layer is formed by energetic O+ with energy larger than 20 keV moving along the +gamma direction in GSE coordinates. It is inferred that these energetic O+ are probably generated due to the selective acceleration effect of the thin reconnection electric field to the upstreaming ionospheric O+ ions with different initial condition.
引用
收藏
页码：11493 / 11500
页数：8
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