论文标题

弱磁体上的太阳能电子沉淀:汞行星

Solar-wind electron precipitation on weakly magnetized bodies: the planet Mercury

论文作者

Lavorenti, Federico, Henri, Pierre, Califano, Francesco, Deca, Jan, Lindsay, Simon, Aizawa, Sae, Benkhoff, Johannes

论文摘要

汞是一种浸入太阳风中的弱磁化,无空的牙槽身体的原型。由于缺乏任何强大的气氛,太阳风直接在汞表面沉淀。我们使用3D全动力学的等离子体模型,首次显示太阳能电子降水驱动器(i)在汞的中性外流中有效电离(H,HE,O和MN),并(II)(II)从星球表面发射X射线。这是使用数值方法在汞上进行X射线极光的第一个独立的证据。

Mercury is the archetype of a weakly magnetized, airless, telluric body immersed in the solar wind. Due to the lack of any substantial atmosphere, the solar wind directly precipitates on Mercury's surface. Using a 3D fully-kinetic self-consistent plasma model, we show for the first time that solar-wind electron precipitation drives (i) efficient ionization of multiple species (H, He, O and Mn) in Mercury's neutral exosphere and (ii) emission of X-rays from the planet's surface. This is the first, independent evidence of X-ray auroras on Mercury using a numerical approach.

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