Influence of hot plasma pressure on the global structure of Saturn's magnetodisk
Influence of hot plasma pressure on the global structure of Saturn's magnetodisk
复制标题
热等离子体压力对土星磁盘整体结构的影响
DOI：
10.1029/2010gl045159
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发表时间：
2010
影响因子：
5.2
通讯作者：
Achilleos N
中科院分区：
文献类型：
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作者：
Achilleos N
使用土星圆盘状磁层中的力平衡模型，我们表明热等离子体压力的变化可以改变磁场配置。这种效应改变了（i）磁层顶的位置，即使在固定的太阳风动态压力下，以及（ii）电离层和磁盘之间的磁映射。该模型使用赤道观测作为边界条件，我们通过与卡西尼高倾角轨道的磁场和热等离子体压力数据进行比较，在很宽的纬度范围内测试其预测。我们发现合理的协议在时间尺度大于土星公里辐射周期（也称为凸轮轴周期）。
Using a model of force balance in Saturn's disk‐like magnetosphere, we show that variations in hot plasma pressure can change the magnetic field configuration. This effect changes (i) the location of the magnetopause, even at fixed solar wind dynamic pressure, and (ii) the magnetic mapping between ionosphere and disk. The model uses equatorial observations as a boundary condition—we test its predictions over a wide latitude range by comparison with aCassinihigh‐inclination orbit of magnetic field and hot plasma pressure data. We find reasonable agreement over time scales larger than the period of Saturn kilometric radiation (also known as the camshaft period).