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Evidence for collisionless magnetic reconnection at Mars

机译:火星无碰撞磁重联的证据

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摘要

Using data from Mars Global Surveyor (MGS) in combination with Particle-In-Cell (PIC) simulations of reconnection, we present the first direct evidence of collisionless magnetic reconnection at Mars. The evidence indicates that the spacecraft passed through the diffusion region where reconnection is initiated and observed the magnetic field signatures of differential electron and ion motion - the Hall magnetic field - that uniquely indicate the reconnection process. These are the first such in-situ reconnection observations at an astronomical body other than the Earth. Reconnection may be the source of Mars' recently discovered auroral activity and the changing boundaries of the closed regions of crustal magnetic field.
机译:使用来自火星全球测量师(MGS)的数据与重新连接中的单元内粒子(PIC)模拟相结合,我们提供了火星无碰撞磁重新连接的第一个直接证据。证据表明,航天器通过了扩散区域,在该区域中重新连接开始,并观察到差分电子和离子运动的磁场特征-霍尔磁场-唯一地表明了重新连接过程。这些是在地球以外的天体上进行的首次此类原位重连观测。重新连接可能是火星最近发现的极光活动和地壳磁场封闭区域边界变化的来源。

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