Influence of the Lower-Hybrid Drift Instability on Magnetic Reconnection in Asymmetric Configurations

被引：94

作者：

Roytershteyn, V. ^{[1
]}

Daughton, W. ^{[2
]}

Karimabadi, H. ^{[1
]}

Mozer, F. S. ^{[3
]}

机构：

[1] Univ Calif San Diego, La Jolla, CA 92093 USA

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[3] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 18期

关键词：

ANOMALOUS RESISTIVITY;

D O I：

10.1103/PhysRevLett.108.185001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using fully kinetic 3D simulations of magnetic reconnection in asymmetric antiparallel configurations, we demonstrate that an electromagnetic lower-hybrid drift instability (LHDI) localized near the X line can substantially modify the reconnection mechanism in the regimes with large asymmetry, a moderate ratio of electron to ion temperature, and low plasma beta. However, the mode saturates at a small amplitude in the regimes typical of Earth's magnetopause. In these cases, LHDI-driven turbulence is predominantly localized along the separatrices on the low-beta side of the current sheet, in agreement with spacecraft observations.

引用

页数：5

共 21 条

[1] Observation of lower hybrid drift instability in the diffusion region at a reconnecting magnetopause [J].