Satellite formation around gas giant planets through a decretion disk in a solids-rich and gas-poor model

• Grant number: 21/12908-3
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: June 01, 2022
• End date: March 31, 2023
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Solar System Astronomy
• Principal Investigator: Ernesto Vieira Neto
• Grantee: Julio Cesar Monteiro dos Santos
• Host Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil
• Associated research grant: 16/24561-0 - On the relevance of small bodies in orbital dynamics, AP.TEM

Abstract

The formation of regular satellites of gas planets in the solar system is explained by two main models. These models explain the formations of the Galilean satellites and Titan, as they occurred in a circumplanetary accretion disk composed of gas and solids around Jupiter and Saturn, respectively, in the first million years of the solar system. the minimum mass subnebula model was proposed by Lunine and Stevenson (1982) and features a static circumplanetary disk with no material flow coming from the protoplanetary disk.The starved gas model (Canup and Ward, 2002) presents a circumplanetary disk continuously fed by the flow of material from the protoplanetary disk through spiral arms (Kley, 1999; Lubow, Seibert and Artymowicz, 1999). Within these disks the solid material would have formed the satellites through some physical mechanism, aided by gravitational and hydrodynamic mechanisms giving rise to the moons observed today (Peale, 1999). However, the improvement of hydrodynamic simulations on the circumplanetary disk has raised some questions about the formation of satellites (Tanigawa et al. 2012; Morbidelli et al. 2014; Szulagyi et al. 2014, 2016; Lambrechts et al. 2019). Among these issues are the accumulation of solids necessary for the formation of satellites on the disk, as well as the process of formation and growth of satellitesimals in satellites. Added to this, a complete understanding of the formation of the satellites of the solar system's gas giants planets still lacks information (Canup and Ward 2009; Miguel and Ida 2016; Ronnet and Johansen 2020). Aiming to contribute to the understanding of the processes that led to the formation of the satellites of the gas giant planets, this doctoral project proposes to study the formation of these satellites in a decretion disk (Batygin and Morbidelli, 2020) considering a hybrid model of the main formation models. (AU)