Spin-orbit coupling for close-in planets

Abstract

We study the spin evolution of close-in planets in multi-body systems and present a very general formulation of the spin-orbit problem. This includes a simple way to probe the spin dynamics from the orbital perturbations, a new method for computing forced librations and tidal deformation, and general expressions for the tidal torque and capture probabilities in resonance. We show that planet-planet perturbations can drive the spin of Earth-size planets into asynchronous or chaotic states, even for nearly circular orbits. We apply our results to Mercury and to the KOI-1599 system of two super-Earths in a 3/2 mean motion resonance.

arXiv comment12 pages, 9 figures

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Cited by in corpus (7)

• Alleviating the transit timing variation bias in transit surveys. I. RIVERS: Method and detection of a pair of resonant super-Earths around Kepler-1705
• Tidal excitation of the obliquity of Earth-like planets in the habitable zone of M-dwarf stars
• Librations of a body composed of a deformable mantle and a fluid core
• Drifts of the sub-stellar points of the TRAPPIST-1 planets
• Tidal evolution of the Pluto-Charon binary
• Surfing in the phase space of spin-orbit coupling in binary asteroid systems
• On the influence of equilibrium tides on transit-timing variations of close-in super-Earths. I. Application to single-planet systems and the case of K2-265 b