Solar-wind electron precipitation on weakly magnetized bodies: the planet Mercury
Federico Lavorenti,
Pierre Henri,
Francesco Califano
et al.
Abstract: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 solarwind 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 ev… Show more
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