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

Autor(es)

Correia, Alexandre C. M. ^{[1, 2]} ; Bouee, Gwenacl ^[1] ; Laskar, Jacques ^[1] ; Rodrieguez, Adrian ^[3]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Astronomy & Astrophysics; v. 571, NOV 2014.
• Citações Web of Science: 37

Resumo

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)

• Processo FAPESP: 12/13731-0 - Evolução spin-órbita de exoplanetas quentes
• Beneficiário: Adrian Rodriguez Colucci
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 09/16900-5 - Evolução dinâmica de sistemas planetários com dissipação
• Beneficiário: Adrian Rodriguez Colucci
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado