MMS observations of ion-scale magnetic island in the magnetosheath turbulent plasma

被引：62

作者：

Huang, S. Y. ^{[1
,2
]}

Sahraoui, F. ^{[2
]}

Retino, A. ^{[2
]}

Le Contel, O. ^{[2
]}

Yuan, Z. G. ^{[1
]}

Chasapis, A. ^{[3
,4
]}

Aunai, N. ^{[2
]}

Breuillard, H. ^{[2
]}

Deng, X. H. ^{[5
]}

Zhou, M. ^{[6
]}

Fu, H. S. ^{[7
]}

Pang, Y. ^{[5
]}

Wang, D. D. ^{[1
]}

Torbert, R. B. ^{[8
]}

Goodrich, K. A. ^{[9
]}

Ergun, R. E. ^{[9
]}

Khotyaintsev, Y. V. ^{[10
]}

Lindqvist, P. -A. ^{[11
]}

Russell, C. T. ^{[12
]}

Strangeway, R. J. ^{[12
]}

Magnes, W. ^{[13
]}

Bromund, K. ^{[14
]}

Leinweber, H. ^{[12
]}

Plaschke, F. ^{[13
]}

Anderson, B. J. ^{[14
]}

Pollock, C. J. ^{[15
]}

Giles, B. L. ^{[15
]}

Moore, T. E. ^{[15
]}

Burch, J. L. ^{[16
]}

机构：

[1] Wuhan Univ, Sch Elect Informat, Wuhan, Peoples R China

[2] UPMC, Ecole Polytech, CNRS, Lab Phys Plasmas, Palaiseau, France

[3] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA

[4] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[5] Nanchang Univ, Inst Space Sci & Technol, Nanchang, Peoples R China

[6] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA

[7] Beihang Univ, Sch Space & Environm, Beijing, Peoples R China

[8] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA

[9] Univ Colorado, LASP, Boulder, CO 80309 USA

[10] Swedish Inst Space Phys, Uppsala, Sweden

[11] Royal Inst Technol, Stockholm, Sweden

[12] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA

[13] Austrian Acad Sci, Space Res Inst, Graz, Austria

[14] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA

[15] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA

[16] Southwest Res Inst, San Antonio, TX USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2016年 / 43卷 / 15期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

magnetic island; magnetosheath; electrostatic solitary waves; lower hybrid drift waves; electron beams; multiscale coupling; ELECTROSTATIC SOLITARY WAVES; EARTHS MAGNETOTAIL; FLUX ROPE; CLUSTER; RECONNECTION; REGION; FIELD; GENERATION; FREQUENCY; SPECTRA;

D O I：

10.1002/2016GL070033

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

In this letter, first observations of ion-scale magnetic island from the Magnetospheric Multiscale mission in the magnetosheath turbulent plasma are presented. The magnetic island is characterized by bipolar variation of magnetic fields with magnetic field compression, strong core field, density depletion, and strong currents dominated by the parallel component to the local magnetic field. The estimated size of magnetic island is about 8 d(i), where d(i) is the ion inertial length. Distinct particle behaviors and wave activities inside and at the edges of the magnetic island are observed: parallel electron beam accompanied with electrostatic solitary waves and strong electromagnetic lower hybrid drift waves inside the magnetic island and bidirectional electron beams, whistler waves, weak electromagnetic lower hybrid drift waves, and strong broadband electrostatic noise at the edges of the magnetic island. Our observations demonstrate that highly dynamical, strong wave activities and electron-scale physics occur within ion-scale magnetic islands in the magnetosheath turbulent plasma.

引用

页码：7850 / 7858

页数：9

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