THEMIS observations of mirror structures: Magnetic holes and instability threshold

被引：64

作者：

Balikhin, M. A. ^{[1
]}

Sagdeev, R. Z. ^{[3
]}

Walker, S. N. ^{[1
]}

Pokhotelov, O. A. ^{[1
]}

Sibeck, D. G. ^{[4
]}

Beloff, N. ^{[2
]}

Dudnikova, G. ^{[3
]}

机构：

[1] Univ Sheffield, Dept Automat Control & Syst Engn, Sheffield S1 3JD, S Yorkshire, England

[2] Univ Sussex, Dept Informat, Falmer BN1 9QJ, England

[3] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

关键词：

PLASMAS;

D O I：

10.1029/2008GL036923

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Nonpropagating mirror-mode structures are commonly observed in many regions of natural plasma such as solar wind, planetary magnetosheaths, in cometary plasma, Io wake, terrestrial ring current and even on the outskirts of solar system. Mirror structures are typically observed in the shape of magnetic holes or peaks. Fast survey mode plasma data from the THEMIS satellites are used to solve the puzzle of how mirror structures in the form of dips can be observed in the regions of mirror stable plasma. THEMIS data also show that for mirror structures with spatial scales that considerably exceed ion Larmor radius the perpendicular temperature anticorrelates with the strength of the magnetic field. This contradiction with the conservation of adiabatic invariants is explained by the role of trapped particles. Citation: Balikhin, M. A., R. Z. Sagdeev, S. N. Walker, O. A. Pokhotelov, D. G. Sibeck, N. Beloff, and G. Dudnikova (2009), THEMIS observations of mirror structures: Magnetic holes and instability threshold, Geophys. Res. Lett., 36, L03105, doi: 10.1029/2008GL036923.

引用

页数：5

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