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Conference Papers Year : 2011

The equilibrium tide in viscoelastic parts of planets

Abstract

Earth-like planets have viscoelastic mantles, whereas giant planets may have viscoelastic cores. As for the fluid parts of a body, the tidal dissipation of such solid regions, gravitationally perturbed by a companion body, highly depends on the tidal frequency, as well as on the rheology. Therefore, modelling tidal interactions presents a high interest to provide constraints on planet properties, and to understand their history and their evolution. Here, we examine the equilibrium tide in the solid core of a planet, taking into account the presence of a fluid envelope. We explain how to obtain the different Love numbers that describe its deformation. Next, we discuss how the quality factor Q depends on the chosen viscoelastic model. Finally, we show how the results may be implemented to describe the dynamical evolution of planetary systems.
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hal-00647825 , version 1 (02-12-2011)

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Françoise Remus, Stéphane Mathis, Jean-Paul Zahn, Valéry Lainey. The equilibrium tide in viscoelastic parts of planets. SF2A 2011: Annual meeting of the French Society of Astronomy and Astrophysics, Jun 2011, Paris, France. pp. 519-522. ⟨hal-00647825⟩
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