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De l’exosphère à la magnétosphère des objets planétaires faiblement magnétisés : optimisation de modélisations parallélisées pour une application à Ganymède

Ludivine Leclercq 1
1 HELIOS - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
Abstract : Jupiter’s moon Ganymede is the biggest and most massive satellite of our solar system. This object has been observed from the Earth, with the Hubble Space Telescope (HST), and through in situ measurements by Galileo spacecraft. Thanks to these observations, a very tenuous atmosphere, or exosphere, has been detected at Ganymede. It is mainly composed of atomic hydrogen, atomic oxygen, and molecular oxygen. Ganymede is the only moon of the solar system to have its own intrinsic magnetic field, which generates a mini-magnetosphere interacting with the magnetospheric jovian plasma. This magnetosphere is embedded in the jovian magnetosphere. It is the only known case of interaction between two magnetospheres. Galileo is the only mission that has investigated the complex ionized environment of Ganymede. The next space mission dedicated to investigate the Jovian magnetosphere and its galilean satellite is an European mission from ESA : JUICE (Jupiter ICy moons Explorer). In the frame of this mission, and to prepare future observations at Ganymede, my thesis work has consisted in modeling the global neutral and ionized environment of Ganymede.
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Submitted on : Thursday, January 14, 2016 - 2:50:55 PM
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  • HAL Id : tel-01256191, version 1

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Ludivine Leclercq. De l’exosphère à la magnétosphère des objets planétaires faiblement magnétisés : optimisation de modélisations parallélisées pour une application à Ganymède. Planétologie et astrophysique de la terre [astro-ph.EP]. Université Paris-Saclay, 2015. Français. ⟨NNT : 2015SACLV017⟩. ⟨tel-01256191v1⟩

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