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2012MNRAS.427.2239R - Mon. Not. R. Astron. Soc., 427, 2239-2250 (2012/December-2)
Spin-orbit coupling for tidally evolving super-Earths.
RODRIGUEZ A., CALLEGARI N.Jr, MICHTCHENKO T.A. and HUSSMANN H.
Abstract (from CDS):
The results of the numerical simulations of the exact equations of motions indicate that, whenever the planet rotation is trapped in a resonant motion, the orbital decay and the eccentricity damping are faster than the ones in which the rotation follows the so-called pseudo-synchronization. Analytical results obtained through the averaged equations of the spin–orbit problem show a good agreement with the numerical simulations.
We apply the analysis to the cases of the recently discovered hot super-Earths Kepler-10b, GJ 3634b and 55 Cnce. The simulated dynamical history of these systems indicates the possibility of capture in several spin–orbit resonances; particularly, GJ 3634b and 55 Cnce can currently evolve under a non-synchronous resonant motion for suitable values of the parameters. Moreover, 55 Cnce may avoid a chaotic rotation behaviour by evolving towards synchronization through successive temporary resonant trappings.
Abstract Copyright: © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
Journal keyword(s): celestial mechanics - planets and satellites: general
Simbad objects: 11
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