Solar wind interaction with the magnetized interstellar medium
Solar wind interaction with the magnetized interstellar medium
复制标题
太阳风与磁化星际介质的相互作用
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
A. Semenov
中科院分区：
文献类型：
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作者：
N. Pogorelov;A. Semenov
恒星风（包括太阳风）与星际介质之间的相互作用是近年来深入研究的课题。这是因为可以将这种相互作用的物理模型与旅行者号、先锋号和宇宙飞船进行的测量进行比较。磁场的存在使得磁流体动力学（MHD）方程的解成为必要，以便对所获得的数据进行适当的分析。我们提出了一个简单的计数方法来模拟恒星风与磁化星际等离子体的相互作用。它基于二阶精度的高分辨率数值格式，与基于雅可比矩阵精确特征分裂的方法相比，大大简化了数值算法。本文提出了适用于MHD计算的亚音速远场外边界无反射边界条件。本文采用一种简单的数值方法，在计算区域内满足无磁场发散的条件，并将此方法应用于分析不同磁场强度下太阳风与星际介质的相互作用，研究了磁场强度对日球顶大小、终端和弓形激波间隔距离的影响。
The interaction between the stellar wind, including the solar wind, and the interstellar medium is the subject of thorough investigation in the latest years. This is due to the possibility of comparison of the physical models for such inter- action with the measurements performed by Voyager, Pioneer, and Ulysses spacecrafts. The presence of the magnetic eld necessitates the solution of the magnetohydrodynamic (MHD) equations for proper analysis of the obtained data. We present hereasimplenumericalapproachforthemodelingofthestellar wind interaction with the magnetized interstellar plasma. It is based on the second-order of accuracy high-resolution numeri- calschemewhichgivesadrasticsimplicationofthenumerical algorithm comparing with the methods based on the exact char- acteristic splitting of the Jacobian matrices. New nonreflecting boundary conditions for subsonic outer boundaries at the far- eld are presented, which are suitable for MHD calculations. A simple numerical approach is used to satisfy the magnetic elddivergence-freeconditioninthecomputationalregion.The method is applied to the analysis of the solar wind { interstel- lar medium interaction for various values of the magnetic eld strength and the influence of the latter is studied on the size of the heliopause and on the termination and the bow shock stand-off distance.