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Conference Papers Year : 2016

3D multispecies collisional model of Ganymede's atmosphere

François Leblanc
Ludivine Leclercq
  • Function : Author
  • PersonId : 974502
Apurva Oza
  • Function : Author
  • PersonId : 972523
Carl Schmidt
  • Function : Author
Ronan Modolo
  • Function : Author
  • PersonId : 916163
Jean-Yves Chaufray

Abstract

Ganymede's atmosphere is produced by the interaction of the Sun and of the Jovian magnetosphere with its surface. It is a reflection of Ganymede's surface properties, but also of the complex interaction between the Ganymede and Jupiter magnetospheres. The Exospheric Global Model (EGM) has been developed in order to be able to integrate surface and magnetosphere processes with those in Ganymede's atmosphere. It is a 3D parallelized multi-species collisional model, coupled with LatHys, a hybrid multi-grid 3D multi-species model of Ganymede's magnetosphere (Leclercq et al., Geophys. Res. Let., Submitted, 2016). EGM's description of the species-dependent spatial distribution of Ganymede's atmosphere, its temporal variability during rotation around Jupiter, its connection to the surface, the role of collisions, and respective roles of sublimation and sputtering in producing Ganymede's exosphere, illustrates how modeling combined with in situ and remote sensing of Ganymede's atmosphere can contribute to our understanding of this unique surface-atmosphere-magnetosphere integrated system.
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insu-01392839 , version 1 (04-11-2016)

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François Leblanc, Ludivine Leclercq, Apurva Oza, Carl Schmidt, Ronan Modolo, et al.. 3D multispecies collisional model of Ganymede's atmosphere. DPS 48 / EPSC 11 (Division for Planetary Sciences and the European Planetary Science Congress), Oct 2016, Pasadena, United States. ⟨insu-01392839⟩
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