Abstract

A self-consistent hybrid model of a thin current sheet (TCS) with a thickness of the order of several ion gyroradii is proposed that takes into account the multicomponent nature of collisionless space plasma. Several plasma components can be present in the tails of the magnetospheres of terrestrial planets (for example, the Earth, Mercury, Mars, and Venus). Variations in the current sheet (CS) structure in magnetospheric plasma in the presence of heavy oxygen ions with different characteristics are analyzed. It is shown that high relative concentrations of oxygen ions, as well as their relatively high temperatures and drift velocities, lead to significant thickening of CS and the formation of an additional embedded scale. In this case, on the profiles of the main characteristics—current density and magnetic field—symmetric breaks appear, which correspond to a sharp change in the gradients of variation in values. A comparison is performed and a qualitative agreement is shown between the simulation results and observational data in the tail of the Martian magnetosphere.

中文翻译：

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太阳系行星磁层中具有多组分等离子体的当前工作表

摘要

考虑到无碰撞空间等离子体的多组分性质，提出了厚度约为几个离子陀螺半径的薄电流片（TCS）的自洽混合模型。在地球行星磁层的尾部可能存在几种等离子体成分（例如，地球，水星，火星和金星）。分析了在存在具有不同特征的重氧离子的情况下，磁层等离子体中电流片（CS）结构的变化。结果表明，较高的氧离子相对浓度以及较高的温度和漂移速度会导致CS显着增稠并形成附加的嵌入水垢。在这种情况下，在主要特性（电流密度和磁场）的轮廓上会出现对称断裂，对应于值变化梯度的急剧变化。进行了比较，并显示了模拟结果与火星磁层尾部的观测数据之间的定性一致性。