An EMHD soliton model for small-scale magnetic holes in magnetospheric plasmas

被引：48

作者：

Li, Ze-Yu ^{[1
,2
]}

Sun, Wei-Jie ^{[3
]}

Wang, Xiao-Gang ^{[4
]}

Shi, Quan-Qi ^{[5
]}

Xiao, Chi-Jie ^{[1
,2
]}

Pu, Zu-Yin ^{[3
]}

Ji, Xiao-Fei ^{[1
,2
]}

Yao, Shu-Tao ^{[5
]}

Fu, Sui-Yan ^{[3
]}

机构：

[1] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China

[2] Peking Univ, Fus Simulat Ctr, Beijing, Peoples R China

[3] Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China

[4] Harbin Inst Technol, Dept Phys, Harbin, Peoples R China

[5] Shandong Univ, Sch Space Sci & Phys, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai, Peoples R China

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2016年 / 121卷 / 05期

关键词：

small-scale magnetic holes; electron magnetohydrodynamics (EMHD); KdV soliton; SOLAR-WIND; MIRROR INSTABILITY; CLUSTER-C1; OBSERVATIONS; FIELD MEASUREMENTS; AU; MAGNETOSHEATH; MECHANISM; SHEET; MAGNETOPAUSE; ELECTRON;

D O I：

10.1002/2016JA022424

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Small-scale magnetic holes (SSMHs) in the magnetosphere plasma sheet are investigated in this paper. A developed electron magnetohydrodynamics (EMHD) soliton model is proposed as a new approach to SSMHs formation. The Biermann battery effect is taken into account in resolving the magnetic evolution equation with a slow-mode solution in the weak nonlinear regime. Statistical investigation of SSMH observation data in the plasma sheet by Cluster is carried out in comparison with the theory. We apply multispacecraft data for distinguishing sheet-like or cylindrical SSMHs observed and clarified by the solitary wave in the EMHD model. Furthermore, the major parameters, such as amplitude, width, maximum magnetic field perturbation, and perpendicular temperature variation of the SSMHs, are found consistent with the theoretical analysis.

引用

页码：4180 / 4190

页数：11

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