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arXiv 1608.04409astro-ph.EPphysics.space-ph
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Hermean向阳面magnetosphere的等离子体流:通过重联区的太阳风注入

Plasma streams in the Hermean dayside magnetosphere: solar wind injection through the reconnection region

J. Varela, F. Pantellini, M. Moncuquet

摘要:

本研究的目的是模拟太阳风与水星磁场的相互作用,并研究磁鞘和行星表面之间的粒子通量。我们使用开放源代码的MHD程序PLUTO模拟了磁层结构,该程序采用了球面几何,并对Hermean磁场进行了多极展开(Anderson,B.等人,2012)。我们进行了两个模拟与现实的太阳风参数研究的等离子体流起源于行星际和Hermean磁场之间的重联区域的属性。等离子体沿着开放的磁场线沉淀到行星表面,表现出快速膨胀、稀薄和冷却。等离子体流与信使号观测到的磁场变平有关,这是由于邻近重联区,太阳风注入到内磁层。

英文摘要:

The aim of this research is to simulate the interaction of the solar wind with the magnetic field of Mercury and to study the particle fluxes between the magnetosheath and the planet surface. We simulate the magnetosphere structure using the open source MHD code PLUTO in spherical geometry with a multipolar expansion of the Hermean magnetic field (Anderson, B. J. et al, 2012). We perform two simulations with realistic solar wind parameters to study the properties of a plasma stream originated in the reconnection region between the interplanetary and the Hermean magnetic field. The plasma precipitates along the open magnetic field lines to the planet surface showing a fast expansion, rarefaction and cooling. The plasma stream is correlated with a flattening of the magnetic field observed by MESSENGER due to the adjacency of the reconnection region where the solar wind is injected to the inner magnetosphere.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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