CPS Workshop on
Icy Moons and Origin of Jupiter and other Giant Planets
last updated: 2009/11/14
　

November 9-10, 2009
Sapporo, JAPAN

 　

We would like to thank you very much your participation!

Venue | Program | Objective | Photos

Venue:.

Hokkaido University (Hokudai),
Science Bldg. #8, 2nd. Floor, Rm. 8-2-01 Cosmo-Studio
(in front of the Poplar avenue, see campus map or Google map)

Cosmo-Studio Cosmo-Studio
Cosmo-Studio 		Science Bldg. #8
Science Bldg. #8

Access to Hokudai & Campus Guide
hokudai.ac.jp
Center for Planetary Science

Program:.

Nov. 9
Session 1 "Satellites; structure and evolution"
13:30
|		 Sho Sasaki (NAOJ)Keynote Speech
13:45
|		 Hauke Hussmann (DLR, German) Interior Structure and Evolution of the Galilean Satellites
14:15
|		 Christine McCarthy (ERI, Univ. Tokyo) The Influence of Second Phases on the Rheological Properties of Ice at Planetary Conditions
14:45
|		 Ryo Nakamura (Tohoku Univ.) The physical property of sulfate fluids at high pressure and its implications to the internal structure of large icy satellites
15:15
|		 Jun Kimura (CPS/Hokudai) Magnetic dichotomy of Ganymede and Europa
15:45
|		 (Break)
16:00
|		 Naruhisa Takato (NAOJ) Origin of inner small satellites of Jupiter
16:30
|		 Fumi Yoshida (NAOJ) An Insight into the Solar System History through the Size Distribution of Jupiter Trojans
17:00
|		 Mitsuteru Sato (Hokudai) Future satellite and ground-based observation of Jovian lightning
17:30
|		 Discussions
17:45 End of the first day
18:30
| 		Welcome party (Place: TBD)
Nov. 10
Session 2 "Satellites: Geology"
09:30
|		 Robert Pappalardo (JPL, US) Geology of the Galilean satellites and Key Questions for Future Missions
10:00
|		 Masahiko Arakawa (Nagoya univ.) Ice-Ice friction measurements related to Europa tectonics
10:30
|		 Minami Yasui (Nagoya Univ.) Flow law of compacted ice-silica mixtures with residual porosity less than 30 %: implications for geology of small icy satellites
11:00
|		 John, F. Cooper (NASA, US) Origins of Cryovolcanism on Icy Moons of the Giant Planet Magnetospheres
11:30
|		 (Lunch Break)
Session 3 "Origin; Giant planets and exoplanets"
13:30
|		 Norio Narita (NAOJ) Spin-Orbit Alignment Angles and Planetary Migration of Jovian Exoplanets
14:00
|		 Masahiro Machida (NAOJ) Circumplanetary disk formation around proto-gas giant planets and implication of the satellite formation
14:30
|		 Takayuki Tanigawa (hokudai) Supply of Solid Materials to Proto-Satellite Disks
15:00
|		 (Break)
15:15
|		 Takanori Sasaki (Titech) Origin of the Different Architectures of the Jovian and Saturnian Satellite Systems
15:45
|		 Masahiro Ogihara (Titech) N-body Simulations of Satellite Formation around Giant Planets
16:15
|		 Discussions
16:30 End of the second day

Objectives:.

Jupiter is the largest planet in the solar system. It is a rapidly rotating gaseous body with main composition is hydrogen and helium. Recent discoveries of extrasolar planets have convinced researchers that Jupiter is the most prominent representative body not only in the solar system but also in the universe. Jupiter has various satellites, four of which were discovered by Galileo in 400 years ago. Jupiter has the strongest planetary magnetosphere in the solar system. EJSM (Europa Jupiter System Mission) is a planned Jovian system mission with three spacecraft aiming at coordinated observations of the Jovian satellites especially Europa and the magnetosphere, atmosphere and interior of Jupiter. Japan will participate in EJSM by a solar power sail spacecraft with Jovian Magnetosphere Orbiter (JMO). After JMO is deployed, the spacecraft will target one of Trojan asteroids. JMO will explore Jovian system in corporation with NASA's JEO (Jupiter Europa Orbiter) and ESA's JGO (Jupiter Ganymede Orbiter).
In front of EJSM Era, to promote the study of Jovian planets and their satellites, CPS (Center for Planetary Science) here plans a unique workshop. This workshop will discuss the structure and origin of icy moons of Jovian planets and also the origin of Jovian planets which would be inseparable from the satellite origin. Also the relation between raw material of Jovian systems and Trojan asteroids as well as non-icy moons will be also discussed.
　太陽系の起源の解明には、太陽以外の質量と角運動量の大部分を占める、木星をはじめとする巨大ガス惑星の起源の解明が必要である．また現在までの系外惑星の観測は、木星のような巨大ガス惑星が宇宙において普遍的な形態であることを示している。つまり木星型惑星の起源の解明は、普遍的な惑星系形成過程の解明という惑星科学の最大目標につながるのである。
　本ワークショップでは、木星（系）の起源の専門家、（小惑星・彗星などを含む）惑星材料物質の研究者、衛星の内部構造（実験・理論）、組成、表面の研究者を集めて、現在・将来の衛星研究から、木星系ひいては太陽系の起源に対してどのような情報が得られるかを議論する。また木星以外の土星・天王星などの衛星やリングに関わる議論も含む形にして、総合的な科学検討を行う。そして、将来にわたり（地上、ミッションを含めて）どのような観測が期待されるか、理論・実験的に追求すべきテーマは何かといった議論を行いたい。
　我が国における木星圏の研究者コミュニティは、欧米のそれと比べて決して大きくはないのが現状であるが、起源研究や広い意味での惑星物質科学を含めた人材は少なくない。このような人材のネットワークを作り、また若手を含めた研究者層の底上げを図ることも本ワークショップの重要な目的である。ガリレオ、カッシーニといった巨大惑星系の探査の後を受けて、2020年代には木星系の探査EJSMが計画されており、日本も参加している。このワークショップの議論は、その科学目的の深化にも貢献する。
　本ワークショップでは、レビューだけではなく大学院生や若手研究者による最新の研究成果も積極的に取り入れることにより、分野の発展とともに人材育成面に配慮することを計画している。

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