Observations of Slow Electron Holes at a Magnetic Reconnection Site

被引：114

作者：

Khotyaintsev, Yu. V. ^{[1
]}

Vaivads, A. ^{[1
]}

Andre, M. ^{[1
]}

Fujimoto, M. ^{[2
]}

Retino, A. ^{[3
]}

Owen, C. J. ^{[4
]}

机构：

[1] Swedish Inst Space Phys, Uppsala, Sweden

[2] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

[3] Austrian Acad Sci, Space Res Inst, A-8010 Graz, Austria

[4] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 16期

基金：

瑞典研究理事会;

关键词：

SOLITARY WAVES; PLASMA; FIELD; COMPUTATION;

D O I：

10.1103/PhysRevLett.105.165002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report in situ observations of high-frequency electrostatic waves in the vicinity of a reconnection site in the Earth's magnetotail. Two different types of waves are observed inside an ion-scale magnetic flux rope embedded in a reconnecting current sheet. Electron holes (weak double layers) produced by the Buneman instability are observed in the density minimum in the center of the flux rope. Higher frequency broadband electrostatic waves with frequencies extending up to f(pe) are driven by the electron beam and are observed in the denser part of the rope. Our observations demonstrate multiscale coupling during the reconnection: Electron-scale physics is induced by the dynamics of an ion-scale flux rope embedded in a yet larger-scale magnetic reconnection process.

引用

页数：4

共 21 条

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