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

Autor(es)

Rodriguez, A. ; Callegari, Jr., N. ; Correia, A. C. M.

• Tipo de documento: Artigo Científico
• Fonte: Monthly Notices of the Royal Astronomical Society; v. 463, n. 3, p. 3249-3259, DEC 2016.
• Citações Web of Science: 4

Resumo

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. (AU)

• Processo FAPESP: 13/16771-6 - Estudo da rotação em sistemas de planetas extrassolares e as suas implicações na evolução orbital
• Beneficiário: Adrian Rodriguez Colucci
• Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores
• Processo FAPESP: 13/21891-0 - Estudo da rotação em sistemas de planetas extrassolares e as suas implicações na evolução orbital
• Beneficiário: Adrian Rodriguez Colucci
• Linha de fomento: Bolsas no Brasil - Apoio a Jovens Pesquisadores