Fragmentation and ablation of the planetesimals in the protoplanetary disks of Jupiter and Saturn

Kronrod, V.A.; Makalkin, A.B.; Kronrod, E.V.

Авторы: Kronrod V.A., Makalkin A.B., Kronrod E.V.
Журнал: Journal of Physics: Conference Series
Том: 1705
Номер: 1
Год издания: 2020
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
Первая страница: 1
Последняя страница: 11
Номер статьи: 012003
DOI: 10.1088/1742-6596/1705/1/012003
Аннотация: In this study we discuss the capture of bodies into the gaseous disks around youngJupiter and Saturn due to gas drag in the disks. We suppose that solution of the problem willallow estimation of the masses and composition of bodies that fell on the growing icy moons.This would provide explanation of the differences in the mean density and internal structure ofgiant icy moons of Jupiter and Saturn. The multiparameter problem of braking, fragmentationand ablation of planetesimals (a comet substance) in the gas medium of the circumplanetarydisk is solved by a modified approach of the meteor physics. Our research shows that asignificant masses of protosatellite material falling on the circumplanetary disks of Jupiter andSaturn are captured in the disks. At the same time the masses captured in the formation regionof different moons are very different. The braking and fragmentation of planetesimals can bethe main parameter in the mechanism of capture mass of planetesimals by the accretion disksof giant planets. There is a significant difference in the mass of material captured by theaerodynamic braking and ablation in the formation regions of Ganymede, Callisto, and Titan(up to 30-40%). For a material strength of 2*104 Pa <* <2*105 Pa, a significant difference inthe amount of matter captured by the disk in the feeding region of the regular ice satellites ofGanymede, Callisto and Titan is possible. The presence of fragmentation is perhaps one of thereasons for the difference in the internal structure of Ganymede, Callisto and Titan.
Добавил в систему: Макалкин Андрей Борисович

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