Homogeneous model for the TRAPPIST-1e planet with an icy layer

Autor(es)

Gevorgyan, Yeva ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Matemat & Estat, BR-05508090 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Astronomy & Astrophysics; v. 650, JUN 21 2021.
• Citações Web of Science: 0

Resumo

In this work, we investigate whether a multilayered planet can be approximated as a homogeneous planet, and in particular how well the dissipation rate of a multilayered planet can be reproduced with a homogeneous rheology. We study the case of a stratified body with an icy crust that, according to recent studies, displays a double peak feature in the tidal response that cannot be reproduced with a homogeneous planet with an Andrade rheology. We revisit the problem with a slightly more complex rheology for the homogeneous body, the Sundberg-Cooper rheology, which naturally has a double peak feature, and apply the model to the TRAPPIST-1e planet. Our results compare very well with the results obtained when employing a multilayered model, showing that it is possible to approximate the behavior of a multilayer icy planet with a homogeneous planet using the Sundberg-Cooper rheology. This highlights the fact that we do not need the complexity of the multilayer planet model in order to estimate the tidal dissipation of an icy planet. (AU)

• Processo FAPESP: 19/25356-9 - Modelos rheologicos de multiplas camadas para mundos gelados com camadas liquidas
• Beneficiário: Yeva Gevorgyan de Mendonça
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado