Mirror-mode-like structures in Venus' induced magnetosphere

被引：46

作者：

Volwerk, M. ^{[1
]}

Zhang, T. L. ^{[1
]}

Delva, M. ^{[1
]}

Voeroes, Z. ^{[3
]}

Baumjohann, W. ^{[1
]}

Glassmeier, K. -H. ^{[2
]}

机构：

[1] Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria

[2] Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterr Phys, D-38106 Braunschweig, Germany

[3] Univ Innsbruck, Inst Astro & Particle Phys, A-6020 Innsbruck, Austria

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS | 2008年 / 113卷

基金：

奥地利科学基金会;

关键词：

D O I：

10.1029/2008JE003154

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The solar wind interaction with Venus creates an induced magnetosphere around the planet. It is shown that within the space bound by Venus' bow shock and ionopause, there is a rich occurrence of mirror-mode-like structures in the magnetic field data. The dayside magnetosheath and nightside magnetosheath/wake regions are investigated separately. It is shown that the probability to observe mirror mode structures is much higher at the dayside, where it is also strongly dependent on the angle between the solar wind magnetic field and the bow shock normal. In Venus' wake the chance to observe these structures is low, most likely because of the fully developed turbulence in this region, which will decrease temperature anisotropies. The results stand in contrast to the very low occurrence rate claimed from data taken by the Pioneer Venus Orbiter mission.

引用

页数：13

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