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 3:30 PM - 5:00 PM A01 (TOKYO BAY MAKUHARI HALL)

convener:Kenji Kurosaki(Department of Physics, Nagoya University), Yusuke Nakauchi(Japan Aerospace Exploration Agency), Chairperson:Kenji Kurosaki(名古屋大学大学院 理学研究科), Yusuke Nakauchi(JAXA/ISAS)

4:45 PM - 5:00 PM

[PPS06-24] Effect on the obliquity due to a giant impact on a rotating ice giant

*Kenji Kurosaki1, Shu-ichiro Inutsuka1 (1.Department of Physics, Nagoya University )

Keywords:Ice giant, Giant impact, Uranus

Solar system planets have intrinsic rotation period and obliquity. Especially, Uranus's obliquity is 98 degrees, which is larger than Jupiter, Saturn, and Neptune. Obliquity of Uranus is to the giant impact event. However, previous studies ignored the pre-impact rotation of Uranus. To understand the tilted rotation axis via a giant impact, we calculate the giant impact on a rotating target. We use Godunov Smoothed Particle Hydrodynamics simulation. We include that a giant impact can reproduce the present obliquity of Uranus if the impactor collides on anti-rotating direction.