We report on the local structure of the Martian subsolar Magnetic Pileup Boundary (MPB) from minimum variance analysis of the magnetic field measured by the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft for six orbits. In particular, we detect a well defined current layer within the MPB and provide a local estimate of its current density which results in a sunward Hall electric force. This force accounts for the deflection of the solar wind ions and the acceleration of electrons which carry the interplanetary magnetic field through the MPB into the Magnetic Pileup Region. We find that the thickness of the MPB current layer is of the order of both the upstream (magnetosheath) solar wind proton inertial length and convective gyroradius. This study provides a high resolution view of one of the components of the current system around Mars reported in recent works.

中文翻译：

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来自 MAVEN 观测的太阳下 MPB 电流层的磁性结构：对霍尔电力的影响

我们通过对火星大气和挥发性演化 (MAVEN) 航天器在六个轨道上测量的磁场的最小方差分析，报告了火星太阳下磁堆积边界 (MPB) 的局部结构。特别是，我们在 MPB 中检测到一个明确定义的电流层，并提供其电流密度的局部估计值，从而导致向阳霍尔电力。该力解释了太阳风离子的偏转和携带行星际磁场通过 MPB 进入磁堆积区的电子的加速。我们发现 MPB 电流层的厚度是上游（磁鞘）太阳风质子惯性长度和对流陀螺半径的数量级。