Japan Geoscience Union Meeting 2019

Presentation information

[J] Oral

P (Space and Planetary Sciences ) » P-PS Planetary Sciences

[P-PS06] Planetary Sciences

Mon. May 27, 2019 1:45 PM - 3:15 PM A01 (TOKYO BAY MAKUHARI HALL)

convener:Kenji Kurosaki(Department of Physics, Nagoya University), Yusuke Nakauchi(Japan Aerospace Exploration Agency), Chairperson:荻原 正博(国立天文台), Yuri Fujii(Nagoya University)

2:15 PM - 2:30 PM

[PPS06-15] Radiation Hydrodynamic Simulations of the Formation of Circumplanetary Disks

*Yuri Fujii1, Oliver Gressel2, Kengo Tomida3, Udo Zieglar2 (1.Institute for Advanced Research, Nagoya University, 2.Leibniz Institute for Astrophysics Potsdam, 3.Osaka University)

Keywords:circumplanetary disks, radiation hydrodynamic simulations, satellite formation

Formation of regular moons and/or planetary atmospheres are governed by the gas flow into the vicinity of forming giant planets. 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 an equation of states that considers effects such as hydrogen dissociation and helium and hydrogen ionization. The region within the deep potential of the planet reached very high temperature regime, however, we observe a disk to form in our simulations.