4 janvier 2021
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Quand :
5 janvier 2021 @ 14 h 00 min – 15 h 00 min
2021-01-05T14:00:00+01:00
2021-01-05T15:00:00+01:00
Où :
Zoom
https://u-bordeaux-fr.zoom.us/j/83772037762?pwd=MXJRbEZlOW9TV2J3Tk1zQUsweVQwZz09
https://u-bordeaux-fr.zoom.us/j/83772037762?pwd=MXJRbEZlOW9TV2J3Tk1zQUsweVQwZz09
Titre : Tides in multi-layer close-in planets
Abstract :
Many rocky exoplanets are detected on close-in orbits. For these planets, tides play an important role by changing their orbit and their rotation. In most studies on the orbital and rotational evolution of planets, simple tidal models have been used. But they are known to have flaws, in particular to correctly describe small rocky planets.
I will first give a background on the theory of tides and discuss the kind of models available in the literature. In particular, most of the models are valid for homogeneous planets, however rocky planets have a complex internal structure with a core, a mantle, a crust and possible ice layers… I will then talk about the study Bolmont et al. 2020, where we discussed how well we can approximate the tidal response of a multi-layer planet with a simpler homogeneous model. Then I will show some preliminary results on how taking into account a more realistic tidal model can influence the rotational evolution of planets.