| Issue |
EAS Publications Series
Volume 82, 2019
Astro Fluid: An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements
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|
|---|---|---|
| Page(s) | 91 - 98 | |
| Section | Tides in Stars and Planets | |
| DOI | https://doi.org/10.1051/eas/1982009 | |
| Published online | 21 June 2019 | |
A.S. Brun, S. Mathis, C. Charbonnel and B. Dubrulle (eds)
EAS Publications Series, 82 (2019) 91-98
On tidal theories and the rotation of viscous bodies
1 IMCCE, Observatoire de Paris, UPMC Univ. Paris 6, PSL Research University, Paris, France
2 CIDMA, Departamento de Física, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
* e-mail: gwenael.boue@obspm.fr
** e-mail: correia@ua.pt
*** e-mail: jacques.laskar@obspm.fr
Celestial bodies are complex systems with the ability to get deformed by tides. Modelling accurately this process is a difficult task even for the planets of our own solar system. This is why tidal theories applied to exoplanets are often reduced to a simple formula accounting for our lack of knowledge. In this work, we identify the three minimal assumptions leading to this level of simplification. We then compare different rheologies compatible with these hypotheses and discuss their qualitative behaviour. Finally, we apply the viscous model to close-in planets and describe their rotation evolution, emphasising the apparition of spin-orbit resonances as the viscous timescale increases.
© EAS, EDP Sciences, 2019