Fine-scale cavitation of ionospheric plasma caused by inertial Alfven wave ponderomotive force

被引：77

作者：

Bellan, PM ^{[1
]}

Stasiewicz, K

机构：

[1] CALTECH, Pasadena, CA 91125 USA

[2] Swedish Inst Space Phys, Uppsala Div, S-75591 Uppsala, Sweden

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.80.3523

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Deep, very narrow magnetic-field-aligned density depletions were observed by the Freja spacecraft during auroral oval crossings. These cavities have perpendicular width of the order of the Electron skin depth c/omega(pe) and are associated with low-frequency electromagnetic perturbations and with discrete auroral structures. We demonstrate here that these cavities are likely produced by the ponderomotive force of inertial Alfven waves.

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页码：3523 / 3526

页数：4

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