Long-Term Orbital Evolution of the Galilean Satellites Due to the Tidal Dissipation
Abstract
The Galilean Satellites are the four biggest satellites of Jupiter; impressive geophysical phenomena take place on and under their surface, such as volcanic eruptions and preservation of liquid water oceans, both due to the tidal forces. Moreover, the motion of the three inner moons (Io, Europa and Ganymede) is characterized by a three-body mean motion resonance, called Laplace resonance. The construction of a long-term dynamical model is not straightforward, because of the presence of resonant angles, which increases considerably the number of terms in the expansion of the perturbations. Using a new semi-analytical model presented in Lari (2018), we investigate the secular evolution of the system under the action of the tidal dissipation. In particular, considering the values of the dissipative parameters of Io and Jupiter obtained in Lainey et al. (2009), we find that the system moves toward a four-body mean motion resonance with ratio 8:4:2:1, involving also the outer moon Callisto.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.P51E2926L
- Keywords:
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- 6218 Jovian satellites;
- PLANETARY SCIENCES: SOLAR SYSTEM OBJECTSDE: 6299 General or miscellaneous;
- PLANETARY SCIENCES: SOLAR SYSTEM OBJECTSDE: 5499 General or miscellaneous;
- PLANETARY SCIENCES: SOLID SURFACE PLANETSDE: 8147 Planetary interiors;
- TECTONOPHYSICS