Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Evening Poster

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

[P-PS08] Planetary Sciences

Sun. May 20, 2018 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Takaya Okamoto(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Kenji Kurosaki(Department of Physics, Nagoya University)

[PPS08-P11] Formation of Uranian system via a giant impact

*Shoji Ueta1, Shigeru Ida2, Masahiro Ogihara3, Alessandro Morbidelli4, Patrick Michel4, Tristan Guillot4, Natsuki Hosono5, Takayuki R Saitoh2 (1.Kyoto University, 2.Tokyo Tech, ELSI, 3.NAOJ, 4.Nice Observatory, 5.JAMSTEC)

Keywords:Uranus, Giant Impact

Uranus has 5 regular satellites. The obliquity of Uranus is over 90°, which is anomalous in our solar system. A giant impact scenario would explain origins of these properties. In this study, we perform high-resolution SPH simulations (N ~ 10^7) for the formation of Uranian system via Giant Impact and show how much material is released around Uranus. In some cases, we find that solid materials are distributed in circum-Uranian orbits after a giant impact, which is massive enough to create satellites. We also find that the amount of materials that are distributed to the circum-Uranian orbit depends on the equation of state (EoS). We want to show results of high-resolution simulations using EoSs, SESAME and ANEOS.