Statistical study of electrostatic solitary waves associated with reconnection: Geotail observations

被引：23

作者：

Li, S. Y. ^{[1
]}

Deng, X. H. ^{[1
]}

Zhou, M. ^{[1
]}

Tang, R. X. ^{[1
]}

Liu, K. ^{[1
]}

Kojima, H. ^{[2
]}

Matsumoto, H. ^{[2
]}

机构：

[1] Wuhan Univ, Key Lab Geospace Environm & Geodesy, State Key Lab Informat Engn Surveying Mapping & R, Inst Elect & Informat, Wuhan 430079, Peoples R China

[2] Kyoto Univ, Res Inst Sustainable Humanosphere, Kyoto 6110011, Japan

来源：

ADVANCES IN SPACE RESEARCH | 2009年 / 43卷 / 03期

基金：

美国国家科学基金会;

关键词：

Space plasma; nonlinear phenomena; Space plasma physics; magnetic reconnection; Electrostatic structures; Magnetosphere physics; PLASMA SHEET; SATELLITE-OBSERVATIONS; GENERATION MECHANISM; AURORAL-ZONE; CLUSTER; SPACECRAFT; MAGNETOSHEATH; MAGNETOPAUSE; MAGNETOTAIL; BOUNDARY;

D O I：

10.1016/j.asr.2008.05.013

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The role of waves in the dynamics of the magnetotail has long been a topic of interest in magnetospheric physics. The characteristics of Electrostatic Solitary Waves (ESWs) associated with reconnection have been studied statistically in the magnetotail by surveying the large amounts data obtained from Waveform Capture (WFC) which is an important component of Plasma Wave Instrument (PWI) on the Geotail spacecraft. About 150 reconnection events with WFC data available are selected, and approximately 10 thousands of ESW waveforms are picked up by hands for statistical study. The ESWs are observed near diffusion region and near the plasma sheet boundary layer (PSBL). Two kinds of waveforms of ESWs are observed: bi-polar and tri-polar pulses. It is found that the pulse width of the ESWs is in the order of 1-5 ms and the peak-to-peak amplitude is in the order of 0.1-5 mV/m. The amplitudes of ESWs are larger in the near-earth tail region than that in deep tail region. ESWs have been observed with or without guide magnetic field (By). The characteristics of ESWs in different reconnection region and under different strength of guild magnetic field, their possible generation mechanism will be discussed. (C) 2008 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：394 / 400

页数：7

共 26 条

[1] Current sheet structure around the near-Earth neutral line observed by Geotail [J].