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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Deformation and tidal evolution of close-in planets and satellites using a Maxwell viscoelastic rheology

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Author(s):
Correia, Alexandre C. M. [1, 2] ; Bouee, Gwenacl [1] ; Laskar, Jacques [1] ; Rodrieguez, Adrian [3]
Total Authors: 4
Affiliation:
[1] UPMC, IMCCE CNRS, ASD, Observ Paris, UMR8028, F-75014 Paris - France
[2] Univ Aveiro, Dept Fis, I3N, P-3810193 Aveiro - Portugal
[3] UNESP, Inst Geociencias & Ciencias Extas, BR-13506900 Rio De Janeiro - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Astronomy & Astrophysics; v. 571, NOV 2014.
Web of Science Citations: 37
Abstract

In this paper we present a new approach to tidal theory. Assuming a Maxwell viscoelastic rheology, we compute the instantaneous deformation of celestial bodies using a differential equation for the gravity field coefficients. This method allows large eccentricities and it is not limited to quasi-periodic perturbations. It can take into account an extended class of perturbations, including chaotic motions and transient events. We apply our model to some already detected eccentric hot Jupiters and super-Earths in planar configurations. We show that when the relaxation time of the deformation is larger than the orbital period, spin-orbit equilibria arise naturally at half-integers of the mean motion, even for gaseous planets. In the case of super-Earths, these equilibria can be maintained for very low values of eccentricity. Our method can also be used to study planets with complex internal structures and other rheologies. (AU)

FAPESP's process: 12/13731-0 - Spin-orbit evolution of close-in exoplanets
Grantee:Adrian Rodriguez Colucci
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 09/16900-5 - Dynamical evolution of planetary systems with dissipation
Grantee:Adrian Rodriguez Colucci
Support type: Scholarships in Brazil - Post-Doctorate