Tidal synchronization of close-in satellites and exoplanets. III. Tidal dissipation revisited and application to Enceladus

Autor(es)

Folonier, H. A. ^[1] ; Ferraz-Mello, S. ^[1] ; Andrade-Ines, E. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY; v. 130, n. 12 DEC 2018.
• Citações Web of Science: 1

Resumo

This paper deals with a new formulation of the creep tide theory (Ferraz-Mello in Celest Mech Dyn Astron 116:109, 2013Paper I) and with the tidal dissipation predicted by the theory in the case of stiff bodies whose rotation is not synchronous but is oscillating around the synchronous state with a period equal to the orbital period. We show that the tidally forced libration influences the amount of energy dissipated in the body and the average perturbation of the orbital elements. This influence depends on the libration amplitude and is generally neglected in the study of planetary satellites. However, they may be responsible for a 27% increase in the dissipation of Enceladus. The relaxation factor necessary to explain the observed dissipation of Enceladus (Pas). For comparison purposes, the results are extended also to the case of Mimas and are consistent with the negligible dissipation and the absence of observed tectonic activity. The corrections of some mistakes and typos of paper II (Ferraz-Mello in Celest Mech Dyn Astron 122:359, 2015) are included at the end of the paper. (AU)

• Processo FAPESP: 16/20189-9 - Evolução dinâmica devida à maré em exoplanetas e satélites diferenciados
• Beneficiário: Hugo Alberto Folonier
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/13750-6 - O Brasil no espaço: Astrofísica e Engenharia
• Beneficiário: Eduardo Janot Pacheco
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais
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• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/10072-0 - Teoria de maré de fluência para sistemas com eixo de rotação inclinado
• Beneficiário: Eduardo Andrade Inês
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado