[P-PS08] 惑星科学

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

*上田 翔士¹、井田 茂²、荻原 正博³、Morbidelli Alessandro⁴、Michel Patrick⁴、Guillot Tristan⁴、細野 七月⁵、斎藤 貴之² (1.京都大学、2.東京工業大学、地球生命研究所、3.国立天文台、4.ニース天文台、5.JAMSTEC)

キーワード：天王星、巨大衝突

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.