Japan Geoscience Union Meeting 2018

Presentation information

[EE] Oral

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

[P-PS04] Results from Akatsuki and advances in Venus science

Tue. May 22, 2018 10:45 AM - 12:15 PM A01 (Tokyo Bay Makuhari Hall)

convener:Takehiko Satoh(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Takeshi Horinouchi(Faculty of Environmental Earth Science, Hokkaido University), Masaru Yamamoto(九州大学応用力学研究所, 共同), Kevin McGouldrick(University of Colorado Boulder), Chairperson:Horinouchi Takeshi, Satoh Takehiko

10:45 AM - 11:10 AM

[PPS04-06] Cooling sequence of terrestrial planets after giant impact: Implications to the formation of oceans on early Venus.

★Invited Papers

*Keiko Hamano1, Hidenori Genda1 (1.Earth-Life Science Institute (ELSI), Tokyo Institute of Technology)

Venus is the closet planet to Earth. It also has a similar size and bulk composition to those of Earth. According to N-body simulations, early Venus could have acquired some amount of water comparable to early Earth, but the present Venus lacks water. Whether it once had oceans, and how and when it lost its water have been long-standing questions in planetary science.

Theoretical studies on planet formation suggest that Earth-sized planets, Earth and Venus, should form as a result of giant impacts between protoplanets, and probably start their lives in a globally molten state. In this talk, we will discuss about possible evolutionary paths of early Venus, based on recent progress of theoretical modeling on cooling sequence after giant impact. Also, important parameters for the formation of oceans on early Venus and relevant issues will be addressed.