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Relationship between the ionospheric conductance, field aligned current, and magnetopause geometry: Global MHD simulations

机译:电离层电导,场对准电流和绝磁几何之间的关系:全局MHD模拟

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摘要

The role of the ionospheric conductance in the solar wind-magnetosphere coupling is studied using global MHD simulations. The simulations with varying conductance and a constant solar wind input show that the field-aligned currents, whose magnitude depends on the ionospheric conductance, affect the size of the magnetopause at the flanks by increasing the local magnetic pressure and thus altering the surface equilibrium at the magnetopause. A current system that generates the magnetic stresses required to account for the location and geometrical structure of the magnetosphere observed in the simulations is proposed.
机译:使用全球MHD模拟研究了电离层电导在太阳风-磁层耦合中的作用。在电导变化且太阳风输入恒定的情况下进行的模拟表明,场定向电流的大小取决于电离层电导,它会通过增加局部磁压并从而改变磁化层表面的平衡来影响侧面的磁绝管的尺寸。磁更年期。提出了一种电流系统,该电流系统产生的磁应力要考虑到在模拟中观测到的磁层的位置和几何结构。

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