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Volatiles and Refractories in Surface-Bounded Exospheres in the Inner Solar System

Abstract : Volatiles and refractories represent the two end-members in the volatility range of species in any surface-bounded exosphere. Volatiles include elements that do not interact strongly with the surface, such as neon (detected on the Moon) and helium (detected both on the Moon and at Mercury), but also argon, a noble gas (detected on the Moon) that surprisingly adsorbs at the cold lunar nighttime surface. Refractories include species such as calcium, magnesium, iron, and aluminum, all of which have very strong bonds with the lunar surface and thus need energetic processes to be ejected into the exosphere. Here we focus on the properties of species that have been detected in the exospheres of inner Solar System bodies, specifically the Moon and Mercury, and how they provide important information to understand source and loss processes of these exospheres, as well as their dependence on variations in external drivers.
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Submitted on : Thursday, June 17, 2021 - 12:06:45 PM
Last modification on : Friday, December 3, 2021 - 11:42:55 AM
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Cesare Grava, Rosemary Killen, Mehdi Benna, Alexey Berezhnoy, Jasper Halekas, et al.. Volatiles and Refractories in Surface-Bounded Exospheres in the Inner Solar System. Space Science Reviews, Springer Verlag, 2021, 217, pp.61. ⟨10.1007/s11214-021-00833-8⟩. ⟨insu-03263459⟩

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