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|Title:||Spin dynamics of close-in planets exhibiting large transit timing variations|
Correia, A. C. M.
Planets and satellites: general
|Abstract:||We study the spin evolution of close-in planets in compact multi-planetary systems. The rotation period of these planets is often assumed to be synchronous with the orbital period due to tidal dissipation. Here we show that planet-planet perturbations can drive the spin of these planets into non-synchronous or even chaotic states. In particular, we show that the transit timing variation (TTV) is a very good probe to study the spin dynamics, since both are dominated by the perturbations of the mean longitude of the planet. We apply our model to KOI-227 b and Kepler-88 b, which are both observed undergoing strong TTVs. We also perform numerical simulations of the spin evolution of these two planets. We show that for KOI-227 b non-synchronous rotation is possible, while for Kepler-88 b the rotation can be chaotic. © ESO, 2017.|
|Appears in Collections:||CIDMA - Artigos|
DFis - Artigos
GGDG - Artigos
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|delisle_2017.pdf||arXiv:1705.04460||5.38 MB||Adobe PDF||View/Open|
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