Japan Geoscience Union Meeting 2014

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International Session (Oral)

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

[P-PS01_30PM1] Toward JUICE and future explorations of outer solar system

Wed. Apr 30, 2014 2:15 PM - 3:55 PM 418 (4F)

Convener:*Jun Kimura(Earth-Life Science Institute, Tokyo Institute of Technology), Takayuki Tanigawa(Institute of Low Temperature Science, Hokkaido University), Sho Sasaki(Department of Earth and Space Sciences, School of Science, Osaka University), Masaki Fujimoto(Institite of Space and Astronautical Science, Japan Aerospace Exploration Agency), Yasumasa Kasaba(Dep. Geophysics Graduate School of Science Tohoku University), Yasuhito Sekine(Department of Complexity Science and Enginerring, Graduate School of Frontier Science, University of Tokyo), Chair:Yasumasa Kasaba(Dep. Geophysics Graduate School of Science Tohoku University), Masaki Fujimoto(Institite of Space and Astronautical Science, Japan Aerospace Exploration Agency)

3:40 PM - 3:55 PM

[PPS01-06] Sub-millimeter observations of icy bodies toward understanding of planetary formation and cosmochemistry

*Yasuhito SEKINE1, Yasuko KASAI2, Hideo SAGAWA2, Takeshi KURODA3, Kenya KODAMA1, Yasunori HORI4, Masahiro IKOMA1, Kiyoshi KURAMOTO5, Hisayoshi YURIMOTO5 (1.University of Tokyo, 2.NICT, 3.Tohoku University, 4.NAOJ, 5.Hokkaido University)

Keywords:sub-millimeter observation, icy satellite, planetary formation, cosmochemistry

The present-day composition of regular icy satellites consists of combinations of initial conditions and subsequent evolution. These icy satellites are considered to have been formed in a circumplanetary disk associated with giant planet formation. Thus, icy satellites that are not geologically active, such as Callisto, would serve as solar system fossils, which may preserve the information of the protoplanetary disk and planetary formation. On the other hand, geologically active satellites, such as Europa and Enceladus, would provide particular geological processes and consequent products of geochemical reaction. Sub-millimeter observations are capable of providing unique isotopic and chemical compositions of gas molecules in atmospheres and plumes of the icy satellites. In this paper, we discuss key observational targets and their importance for planetary formation theory and geo/cosmochemistry, especially focusing on sub-millimeter observations of Galilean satellites by the Jupiter Icy moons Explorer mission, JUICE.