SIMBAD references

2016MNRAS.463.3249R - Mon. Not. R. Astron. Soc., 463, 3249-3259 (2016/December-2)

Coupled orbital and spin evolution of the CoRoT-7 two-planet system using a Maxwell viscoelastic rheology.


Abstract (from CDS):

We investigate the orbital and rotational evolution of the CoRoT-7 two-planet system, assuming that the innermost planet behaves like a Maxwell body. We numerically resolve the coupled differential equations governing the instantaneous deformation of the inner planet together with the orbital motion of the system. We show that, depending on the relaxation time for the deformation of the planet, the orbital evolution has two distinct behaviours: for relaxation times shorter than the orbital period, we reproduce the results from classic tidal theories, for which the eccentricity is always damped. However, for longer relaxation times, the eccentricity of the inner orbit is secularly excited and can grow to high values. This mechanism provides an explanation for the present high eccentricity observed for CoRoT-7 b, as well as for other close-in super-Earths in multiple planetary systems.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): planets and satellites: dynamical evolution and stability - planet-star interactions - planet-star interactions

Simbad objects: 3

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