Oral Presentation

Radiation Hydrodynamic Simulations of the gas flow into the vicinity of gas giants

Author(s): Yuri Fujii (Nagoya University); Oliver Gressel (Niels Bohr Institute); Kengo Tomida (Osaka University); Udo Ziegler (Leibniz Institute for Astrophysics Potsdam)

Presenter: Yuri Fujii (Nagoya University)

Behavior of the gas flow into the vicinity of forming gas giants governs the formation of planetary atmospheres and/or regular moons. Gas around a sufficiently massive planet is thought to form a circumplanetary disk instead of falling directly onto the planet. Recent studies, however, have shown that the circumplanetary gas forms an expanded envelope rather than a thin, rotationally supported Keplerian disk in cases where the gas temperature is very high. Thus, calculating the temperature of the accretion flow properly is important to determine the disk structure. We performed three-dimensional radiation hydrodynamic simulations of the formation of circumplanetary disks with the equation of states that considers effects such as hydrogen dissociation. With this, we observed a disk-like structure to form in our simulations, even though the temperature is not very lower than the previous studies.