New constraints on Io's and Jupiter's tidal dissipation |
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Authors: | Valéry Lainey Gabriel Tobie |
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Institution: | a Observatoire Royal de Belgique, 3 Avenue Circulaire, B-1180, Bruxelles, Belgium b IMCCE/Observatoire de Paris, UMR 8028 du CNRS, 77 Avenue Denfert-Rochereau, 75014 Paris, France c UMR 6112 Planétologie and Géodynamique, UFR des Sciences et Techniques 2, rue de la Houssinière, BP 92208 44322 Nantes cedex 03, France |
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Abstract: | Although the quest for tidal accelerations among the Galilean satellites has been ongoing since the beginning of the last century, no real agreement has been found so far. Using a numerical approach, we simulate the effect of tidal interactions on the evolution of Io's motion during the last century. We show how these tidal effects can vanish during the fit process to observational data. By testing different values of dissipation within Io and Jupiter, we show that a non-detection of significant Io's orbital acceleration does not imply a large dissipation within Jupiter, and we suggest an upper bound value ( ) for the dissipation rate within Io. |
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Keywords: | Galilean satellites Tidal dissipation Orbital dynamics |
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