Poster De Conférence Année : 2024

Energetic Neutral Atoms at Ganymede and Europa : preparation to the JUICE mission

Résumé

The JUICE (JUpiter ICy moon Explorer) mission, launched by the European Space Agency in April 2023, the first large mission within the Cosmic Vision Program 2015–2025, will arrive in the jovian system in 2031 and it will provide the most comprehensive exploration to date of the Jovian system in all its complexity, with particular emphasis on Ganymede as a planetary body and potential habitat (JUICE Red Book, 2014). The Galilean satellites are known to have thin atmospheres, technically exospheres (McGrath et al., 2004), produced by ion-induced sputtering and sublimation of the surface materials. These moons and tenuous atmosphere are embedded in the flowing plasma of the jovian. The interaction between the neutral environments of the Galilean satellites and the jovian plasma changes the plasma momentum, the temperature and generates strong electrical currents. A modeling effort has been carried out at LATMOS (PhD R. Allioux, IRAP, 2012 ; L. Leclercq, LATMOS, 2015 ; O. Apurva, LATMOS, 2017, PhD C. Baskevitch, 2023). A 3D parallel multi-species hybrid model (Latmos Hybrid Simulation, LatHyS) has been developed to model and characterize the plasma environment of Ganymede (Leclercq et al, 2016 ; Modolo et al, 2016) and Europa (Baskevitch et al, 2023, in prep) and a 3D parallel multi-species exospheric model (Exospheric Global Model, EGM) to pattern the dynamic of the neutral envelopes of Ganymede (Turc et al, 2014 ; Leblanc et al, 2017) and Europa (Oza et al, 2019 ; Leblanc et al, 2023). A first attempt to couple 3D exospheric and magnetospheric descriptions to characterize Ganymede’s ionosphere has been achieved by Carnielli et al, (2019, 2020a,2020b). Among the measurements that will be performed by JUICE, the Particle Environmental Package will be able to monitor the interaction with the ENA imaging technique. We use the same approach than Holmström et al (2002) to calculate the ENA fluxes, applied to LatHyS and EGM results. We present some possible ENA images that could be obtained for different configurations.

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hal-04933470 , version 1 (07-02-2025)

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  • HAL Id : hal-04933470 , version 1

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Ronan Modolo, Claire Baskevitch, Thomas Le Liboux, François Leblanc, Baptiste Cecconi, et al.. Energetic Neutral Atoms at Ganymede and Europa : preparation to the JUICE mission. PNST2024, Jan 2024, Marseille, France. ⟨hal-04933470⟩
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