Solar-Wind Proton Anisotropy Versus Beta Relation

被引：67

作者：

Seough, Jungjoon ^{[1
]}

Yoon, Peter H. ^{[1
]}

Kim, Khan-Hyuk ^{[1
]}

Lee, Dong-Hun ^{[1
]}

机构：

[1] Kyung Hee Univ, Sch Space Res, Yongin 446701, Gyeonggi, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 07期

关键词：

TEMPERATURE ANISOTROPY; FIRE-HOSE; MAGNETOSHEATH; INSTABILITY; PLASMA; CONSTRAINT;

D O I：

10.1103/PhysRevLett.110.071103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The present Letter puts forth a possible explanation for the outstanding problem of measured proton temperature anisotropy in the solar wind at 1 AU apparently being regulated by the mirror and oblique fire-hose instabilities. Making use of the fact that the local magnetic field intensity near 1 AU undergoes intermediate-scale temporal variations, the present Letter carries out the quasilinear analysis of the temperature anisotropy-driven instabilities with a time-varying local B field, assuming arbitrary initial temperature ratios and parallel betas. It is found that the saturated states in (beta(parallel to), T-perpendicular to/T-parallel to) space are bounded by the mirror and oblique fire-hose instabilities, which is superficially similar to the observation. DOI: 10.1103/PhysRevLett.110.071103

引用

页数：4

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