Spin-orbit coupling for close-in planets
Earth and Planetary Astrophysics
2021-12-30 v1 Dynamical Systems
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.
Cite
@article{arxiv.2112.14335,
title = {Spin-orbit coupling for close-in planets},
author = {Alexandre C. M. Correia and Jean-Baptiste Delisle},
journal= {arXiv preprint arXiv:2112.14335},
year = {2021}
}
Comments
12 pages, 9 figures