Stratified rheological models for icy worlds with liquid layers

• Grant number: 19/25356-9
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: October 01, 2020
• End date: November 30, 2023
• Field of knowledge: Physical Sciences and Mathematics - Mathematics - Applied Mathematics
• Principal Investigator: Clodoaldo Grotta Ragazzo
• Grantee: Yeva Gevorgyan de Mendonça
• Host Institution: Instituto de Matemática e Estatística (IME). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 16/25053-8 - Dynamics and geometry in low dimensions, AP.TEM
• Associated scholarship(s): 21/09679-2 - Stratified rheological models for icy worlds with liquid layers, BE.EP.PD

Abstract

The goal of this project is to propose and analyse multilayered rheological models for the dynamics of extended deformable bodies evolving under the influence of gravitational forces. A typical case is that of a satellite with icy crusts, subsurface oceans, molten mantles and solid cores orbiting a giant planet in either our solar system or in exoplanetary systems. Important questions that we intend to address with the proposed models are, among others, whether the tidal dissipation in the liquid layer caused by the forced librations and the obliquity of the orbit of the satellites is large enough compared with the dissipation in the solid layers and the radiogenic heating and whether a possible mechanical decoupling between the dynamics of the solid and liquid layers can lead to anomalous spin states in stratified bodies, as it seems to be the case of Titan. This project will be executed in the context of an ongoing effort to nucleate a research group in mathematical celestial mechanics and applications at IME-USP together with top international collaborators from France, Portugal, Germany and USA. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GEVORGYAN, YEVA. Homogeneous model for the TRAPPIST-1e planet with an icy layer. Astronomy & Astrophysics, v. 650, JUN 21 2021. (19/25356-9)

GEVORGYAN, YEVA; MATSUYAMA, ISAMU; RAGAZZO, CLODOALDO. Equivalence between simple multilayered and homogeneous laboratory-based rheological models in planetary science. Monthly Notices of the Royal Astronomical Society, v. 523, n. 2, p. 10-pg., 2023-05-30. (21/09679-2, 16/25053-8, 19/25356-9)