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arXiv 1008.3791astro-ph.EPphysics.space-ph
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热等离子体压力对土星磁盘整体结构的影响

Influence of Hot Plasma Pressure on the Global Structure of Saturn's Magnetodisk

N. Achilleos, P. Guio, C. S. Arridge, N. Sergis, R. J. Wilson, M. F. Thomsen, A. J. Coates

摘要:

使用模型的力平衡在土星的盘状磁层,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,我们测试其预测在很宽的纬度范围内比较卡西尼高倾角轨道的磁场和热等离子体压力数据。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)。

英文摘要:

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 a Cassini high-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).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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