An axisymmetric magnetohydrodynamic model for the interaction of the solar wind with the local interstellar medium
An axisymmetric magnetohydrodynamic model for the interaction of the solar wind with the local interstellar medium
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太阳风与当地星际介质相互作用的轴对称磁流体动力学模型
DOI：
10.1134/1.1323281
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
A. Myasnikov
中科院分区：
文献类型：
--
作者：
D. Aleksashov;V. Baranov;E. Barsky;A. Myasnikov
我们数值分析了球对称太阳风与由等离子体、氢原子和磁场组成的三组分局部星际介质（LISM）相互作用的磁流体力学稳态模型。假定磁场与LISM中的速度平行。在这种情况下，模型是轴对称的。研究了磁场对等离子体流动几何形状和氢原子参数分布的影响。特别是，我们表明氢原子的存在不影响弓形激波、日球层顶和太阳风激波的形状随着星际磁场强度的增加而发生质的变化。LISM中磁场的存在可以强烈地影响源自太阳风的高能氢原子的参数，尽管它对HST航天器上的GHRS仪器观测到的“氢壁”的影响很小（Linsky and Wood 1996）。
We numerically analyze a magnetohydrodynamic, steady-state model for the interaction of a spherically symmetric solar wind with a three-component local interstellar medium (LISM), which is composed of plasma, hydrogen atoms, and a magnetic field. The magnetic field is assumed to be parallel to the velocity in the LISM. In this case, the model is axisymmetric. We study the effects of magnetic field on the plasma-flow geometry and on the distribution of hydrogen-atom parameters. In particular, we show that the presence of hydrogen atoms does not affect the qualitative change in the shape of the bow shock, the heliopause, and the solar-wind shock with increasing strength of the interstellar magnetic field. The presence of a magnetic field in the LISM can strongly affect the parameters of the energetic hydrogen atoms originated in the solar wind, although its effect on the “hydrogen wall” observed with the GHRS instrument onboard the HST spacecraft (Linsky and Wood 1996) is marginal.