极星内拉格朗日点附近的流结构特征
Features of the Flow Structure in the Vicinity of the Inner Lagrangian Point in Polars
摘要：
研究了吸积体具有强内禀磁场的密近双星系统中等离子体流的结构。考虑了一个具有典型极坐标参数的密近双星系统。本文给出了从施主到吸积体洛希瓣的物质流的三维数值模拟结果。特别注意的是在附近的内拉格朗日点，在那里的吸积流形成的流动结构。来自施主包层的吸积流物质与吸积体的磁场的相互作用导致形成磁层的分级结构，因为吸积流的较低密度区域比较高密度区域更早地被白矮星的磁场捕获。考虑这种磁层结构会影响分析结果和观测结果的解释。
英文摘要：
The structures of plasma flows in close binary systems whose accretors have strong intrinsic magnetic fields are studied. A close binary system with the parameters of a typical polar is considered. The results of three dimensional numerical simulations of the material flow from the donor into the accretor Roche lobe are presented. Special attention is given to the flow structure in the vicinity of the inner Lagrangian point, where the accretion flow is formed. The interaction of the accretion flow material from the envelope of the donor with the magnetic field of the accretor results in the formation of a hierarchical structure of the magnetosphere, because less dense areas of the accretion flow are captured by the magnetic field of the white dwarf earlier than more dense regions. Taking into account this kind of magnetosphere structure can affect analysis results and interpretation of the observations.
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