A new concept of plasma motion and planetary magnetic field for Venus
A new concept of plasma motion and planetary magnetic field for Venus
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金星等离子体运动和行星磁场的新概念
DOI：
10.1029/gl009i007p00765
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发表时间：
1982
影响因子：
5.2
通讯作者：
K. Miller
中科院分区：
文献类型：
--
作者：
W. C. Knudsen;P. Banks;K. Miller
我们表明，金星电离层的磁流体动力学条件附近的终结者有利于磁场的对流，而不是扩散。因此，金星可能拥有的任何行星磁场都将受到先锋金星减速电位分析仪所揭示的电离层全球反日流动的强烈影响。来自内部磁场的磁通量将在夜半球积累。这种聚集的结构和动力学细节取决于磁场源和随时间变化的等离子体流动模式的特定细节，但对观测数据的简单解释产生了7 × 1020 G cm³的磁偶极矩，其方向沿着行星自旋矢量。
We show that the magnetohydrodynamic conditions of the Venus ionosphere near the terminator favor convection of magnetic field rather than diffusion. Consequently, any planetary magnetic field which Venus may possess will be strongly affected by the global antisunward flow of the ionosphere which has been revealed by the Pioneer-Venus retarding potential analyzer. The magnetic flux from an internal magnetic field will accumulate in the night hemisphere. Details of the structure and dynamics of such accumulations depend on particular details of the magnetic field source and the time-dependent plasma flow pattern, but a simple interpretation of observational data yields a magnetic dipole moment of 7 × 1020 G cm³ directed along the planet spin vector.