This paper evaluates the role of magnetic reconnection in the dayside ionosphere of Mars in the collisional regime and presents some relevant data from the MAVEN (Mars Atmosphere and Volatile EvolutioN) mission. Magnetic reconnection is an important process operating in the solar corona, planetary magnetospheres, and astrophysical plasmas, but most of the literature focuses on collisionless plasmas. However, at Mars the reconnection should often occur in regions where collisions are important. Mars does not have a large‐scale global magnetic field; however, Mars has locally large magnetic fields associated with remnant crustal magnetization, particularly in the highland regions of the southern hemisphere. The crustal fields provide a “target” for reconnection both in the ionosphere and in the magnetotail of Mars. The current paper emphasizes the dayside ionosphere. Magnetic reconnection is associated with topological changes in the magnetic field and is also a source of energy for the plasma and can thus affect the ionospheric dynamics and ion loss at Mars. Both theoretical concepts and MAVEN particle and field data from several instruments are considered in this paper.

中文翻译：

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火星电离层中的磁重联：碰撞的作用

本文评估了磁重联在火星的日间电离层在碰撞状态下的作用，并提出了来自MAVEN（火星大气和挥发份）飞行任务的一些相关数据。磁重连接是在日冕，行星磁层和天体等离子体中运行的重要过程，但是大多数文献都集中在无碰撞等离子体上。但是，在火星，重新连接通常应该发生在碰撞很重要的区域。火星没有大规模的全球磁场；然而，火星具有与残余地壳磁化有关的局部大磁场，特别是在南半球的高地地区。地壳场为电离层和火星的磁尾中的重新连接提供了“目标”。当前的论文强调了日间电离层。磁重新连接与磁场的拓扑变化相关，并且也是等离子体的能量来源，因此可以影响电离层动力学和火星上的离子损失。本文考虑了理论概念以及几种仪器的MAVEN粒子和场数据。