Multiple Alfven wave reflections excited by Io: Origin of the Jovian decametric arcs
Multiple Alfven wave reflections excited by Io: Origin of the Jovian decametric arcs
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艾欧激发的多次阿尔文波反射：木星十度弧的起源
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
C. Goertz
中科院分区：
文献类型：
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作者：
D. Gurnett;C. Goertz
最近旅行者号在木星附近的射电天文学测量表明，木星的十米波辐射由许多离散的特征组成，这些特征被称为十米波弧，在所有的木星轨道上都可以观察到。一般认为，这些弧是由木卫一与木星磁层的相互作用产生的。本文提出大量的十米弧是由Io激发的阿尔芬驻波电流系统的多次反射引起的。对电离层反射系数和其他衰减过程的估计表明，可能会发生大量的反射，阿尔芬波流系统可能完全围绕木星延伸。这种源的几何形状可以解释木星十米辐射的许多令人困惑的特征，
The recent Voyager radio astronomy measurements near Jupiter show that the Jovian decametric radiation consists of numerous discrete features called decametric arcs which are observed at all Jovian longitudes. It is generally believed that these arcs are produced by an interaction of Io with the Jovian magnetosphere. In this paper we propose that the large number of decametric arcs is caused by multiple reflections of a standing Alfven wave current system excited by Io. Estimates of the reflection coefficient at the ionosphere and other damping processes show that a large number of reflections can occur, with the Alfven wave current system possibly extending completely around Jupiter. This source geometry can account for a number of otherwise puzzling characteristics of the Jovian decametric radiations,