[P-PS07] Planetary Sciences

[PPS07-19] Supply of satellite material into circumplanetary disks around giant planets: dependence on the vertical distribution of dust and planetary mass

*Natsuho Maeda¹, Keiji Ohtsuki¹, Ryo Suetsugu², Takayuki Tanigawa³, Masahiro N Machida⁴ (1.Kobe University , 2.National Institute of Technology, Oshima College, 3.National Institute of Technology, Ichinoseki College, 4.Kyushu University)

Keywords:Planet formation, Satellite formation

The principal satellites of giant planets, such as Galilean satellites and Titan, are considered to be formed by the accretion of solid materials in the gaseous disk around a giant planet, i.e., circumplanetary disk. Although building blocks of the satellites are likely to be supplied from the protoplanetary disk into the circumplanetary disk, there are many unknowns in the supply process. Recent numerical studies show that three-dimensional gas flow around a planet significantly influences the supply of solid materials (Tanigawa et al. 2012, 2014; Homma et al. 2020). On the other hand, it is not well understood yet how the process depends on planetary mass. In this work, we calculate the orbits of solid particles considering the gas drag force using the gas field obtained by the local three-dimensional hydrodynamic simulation (Maeda et al. 2022). Then we investigate the planetary-mass dependence of the supply process of dust particles to the circumplanetary disk.
We found that the larger the planetary mass, the more dust is captured by the circumplanetary disk over a larger radial region. We also found that the dust mass accretion rate into the circumplanetary disk highly depends on dust scale height in the protoplanetary disk but not so much on the planetary mass. In addition, we found that the planetary mass of the dust-to-gas inflow rate ratio into the circumplanetary disk depends on the degree of dust stirring in the protoplanetary disk.
We will discuss the implication for satellite formation around a giant planet based on the above results, the latest satellite formation model, and observations of the circumplanetary candidates.