Origin and diversity among the large icy moons: Ganymede, Callisto and Titan

• Project/Area Number: 25800242
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Solid earth and planetary physics
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Kimura Jun 東京工業大学, 地球生命研究所, EON研究員 (00536138)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 氷衛星 / 惑星科学 / 衛星 / 内部構造 / テクトニクス / 熱史 / 氷 / 磁場

Outline of Final Research Achievements

To explain diverse characteristics of surface and interior among three large icy moons, we constructed a new evolutional model considering the primordial hydrous core. In Ganymede, having largest radius and bulk density, decay energy of the long-lived radioactive elements heats the hydrous core, then deeper part of the core should be dehydrated and its viscosity became larger. Eventually the temperature of deeper core exceeds the eutectic of the metallic components, which means the metallic core can be formed. Dehydrated water would be risen up and large expansion and extensional tectonics must be occurred.
In Callisto, having little smaller radius and density than Ganymede, dehydration of the hydrous core would be insufficient and large metallic core could not be formed. Titan has an intermediate radius and density between Ganymede and Callisto, and dehydration of the hydrous core and metallic core formation can be occurred though its amount would be smaller than Ganymede.

Research Products

• [Int'l Joint Research] Jet Propulsion Laboratory/Caltech/U southeran Calif(米国)
• [Int'l Joint Research] ELSI, titech/JAMSTEC(Japan)
• [Int'l Joint Research] INGV(Italy)
• [Int'l Joint Research] U Leeds(英国)
• [Int'l Joint Research] IST(Portugal)
• [Journal Article] Evaluation of Global Expansion of Ganymede During the Course of Thermal Evolution (2016)
  • Author(s): Masahiro Yoda, Jun Kimura, Kei Kurita
  • Journal Title: Proc. 47th Lunar and Planetary Science Conference Volume: 2016 Pages: 1848-1848
  • Open Access
• [Journal Article] Polymerization of building blocks of life on Europa and other icy moons (2015)
  • Author(s): Kimura, J., Kitadai, N.
  • Journal Title: Astrobiology Volume: 15 Issue: 6 Pages: 430-441
  • DOI: 10.1089/ast.2015.1306
  • Peer Reviewed
• [Journal Article] A Strategy for Origins of Life Research (2015)
  • Author(s): Scharf, C., Virgo, N., Cleaves, H.J., Aono, M., Aubert-Kato, N., Aydinoglu, A., Brasser, R.
  • Journal Title: Astrobiology Volume: 15 Issue: 12 Pages: 1031-1042
  • DOI: 10.1089/ast.2015.1113
  • NAID: 120006800829
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Polymerization of building blocks of life on Europa and other icy moons (2015)
  • Author(s): Kimura, J., and Kitadai, N.
  • Journal Title: Astrobiology Volume: N/A
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Geology and photometric variation of Solar System bodies with minor atmospheres: Implications for solid exoplanets (2014)
  • Author(s): Fujii, Y., Kimura, J., Dohm, J., Ohtake, M.
  • Journal Title: Astrobiology Volume: 14 Issue: 9 Pages: 753-768
  • DOI: 10.1089/ast.2014.1165
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Scientific use of LIDAR data of Hayabusa-2 Mission (2014)
  • Author(s): Namiki, N., Mizuno, T., Hirata, N., Noda, H., Senshu, H., Yamada, R., Ikeda, H., Abe, S., Matsumoto, K., Oshigami, S., Miyamoto, H., Sasaki, S., Araki, H., Tazawa, S., Shizugami, M., Ishihara, Y., Kobayashi, M., Wada, K., Demura, H., Kimura, J., Yoshida, F., Hirata, N.
  • Journal Title: New Results in the Observations and Space Exploration of Asteroids Volume: N/A Pages: 74-96
  • Peer Reviewed
• [Journal Article] Exploration of Enceladus’ water-rich plumes toward understanding of chemistry and biology of the interior ocean (2014)
  • Author(s): Sekine, Y., Takano, Y., Yano, H., Funase, R., Takai, K., Ishihara, M., Shibuya, T., Tachibana, S., Kuramoto, K., Yabuta, H., Kimura, J., Furukawa, Y.
  • Journal Title: Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan 12 Volume: 29 Pages: 7-11
  • NAID: 130004548657
  • Peer Reviewed
• [Journal Article] Near-infrared Brightness of Ganymede and Callisto Eclipsed in Jovian Shadow: A New Scope to Investigate Jovian Upper Atmosphere (2014)
  • Author(s): Kohji Tsumura, Ko Arimatsu, Eiichi Egami, Yutaka Hayano, Chikatoshi Honda, Jun Kimura, Kiyoshi Kuramoto, Shuji Matsuura, Yosuke Minowa, Kensuke Nakajima, Taishi Nakamoto, Mai Shirahata, Jason Surace, Yasuto Takahashi, and Takehiko Wada
  • Journal Title: Astrophysical Journal Volume: 789 Issue: 2 Pages: 122-128
  • DOI: 10.1088/0004-637x/789/2/122
  • Peer Reviewed / Open Access
• [Journal Article] Exploration of Enceladus’ water-rich plumes toward understanding of chemistry and biology of the interior ocean (2014)
  • Author(s): Yasuhito Sekine, Yoshinori Takano, Hajime Yano, Ryu Funase, Ken Takai, Morio Ishihara, Takazo Shibuya, Shogo Tachibana, Kiyoshi Kuramoto, Hikaru Yabuta, Jun Kimura, Yoshihiro Furukawa
  • Journal Title: Transactions of Japan Society for Aeronautical and Space Sciences, Special Issue of ISTS Volume: in press
  • NAID: 130004548657
  • Peer Reviewed
• [Journal Article] Icy moon and water ocean: Explorations of the Jovian system (2014)
  • Author(s): Jun Kimura
  • Journal Title: Transactions of the Institute of Natural Science, Senshu University Volume: in press
• [Journal Article] Back to Jupiter with renovated interest in the system and fresh focus on the icy moons (1): Jupiter system exploration mission "JUICE" as the mission by mankind (2013)
  • Author(s): Jun Kimura, Sho Sasaki, and Masaki Fujimoto
  • Journal Title: Planetary People Volume: 22 Pages: 146-151
  • NAID: 110009660453
• [Presentation] Toward understanding of the extra-terrestrial habitability (2016)
  • Author(s): Jun Kimura
  • Organizer: Upstairs Downstairs: Consequences of Internal Planet Evolution for the Habitability and Detectability of Life on Extrasolar Planets
  • Place of Presentation: Tempe, AZ, US
  • Year and Date: 2016-02-17
  • Int'l Joint Research / Invited
• [Presentation] Long-term stability of an subsurface ocean in Ganymede and its effect to tidal response, toward future altimetry measurement (2015)
  • Author(s): Jun Kimura Shunichi Kamata, Steve Vance and Hauke Hussmann
  • Organizer: AGU Fall Meeting 2015
  • Place of Presentation: SanFrancisco, US
  • Year and Date: 2015-12-14
  • Int'l Joint Research
• [Presentation] Toward characterization of extra-terrestrial deep water world and its habitability using computational approach and spacecraft exploration (2015)
  • Author(s): Jun Kimura and Shunichi Kamata
  • Organizer: 8th Japan Astrobilogy Network Workshop
  • Place of Presentation: Tokyo
  • Year and Date: 2015-11-27
  • Int'l Joint Research
• [Presentation] Primordial hydrous model for Ganymede might explain a formation of extensional groove and metallic core (2015)
  • Author(s): Jun Kimura and Kiyoshi Kuramoto
  • Organizer: JUICE/GALA meeting 2015
  • Place of Presentation: Berlin, Germany
  • Year and Date: 2015-11-11
  • Int'l Joint Research
• [Presentation] Tidal deformation of Ganymede and effects of a subsurface ocean: a model calculation in preparation for JUICE-GALA measurements (2015)
  • Author(s): Jun Kimura, Shunichi Kamata, Koji Matsumoto, Francis Nimmo and Kiyoshi Kuramoto
  • Organizer: AOGS 2015 Annual Meeting
  • Place of Presentation: Singapore
  • Year and Date: 2015-08-03
  • Int'l Joint Research
• [Presentation] Stability of an internal ocean in Ganymede (2015)
  • Author(s): Jun Kimura, Steve Vance, Hauke Hussmann and Kei Kurita
  • Organizer: Astrobiology Science Conference 2015
  • Place of Presentation: Chicago, US
  • Year and Date: 2015-06-15
  • Int'l Joint Research
• [Presentation] Interior evolution of Ganymede and its surface manifestation: toward JUICE measurements (2015)
  • Author(s): Jun Kimura and Kiyoshi Kuramoto
  • Organizer: JpGU 2015
  • Place of Presentation: Chiba, Japan
  • Year and Date: 2015-05-24
  • Int'l Joint Research
• [Presentation] Subsurface Ocean in the Icy Moons, as Possible Extraterrestrial Habitats (2014)
  • Author(s): Jun Kimura
  • Organizer: 衛星系研究会
  • Place of Presentation: 北海道大学
  • Year and Date: 2014-08-27
• [Presentation] Divergent evolutional model among the large icy moons: Metallic core formation (2014)
  • Author(s): Jun Kimura, Kiyoshi Kuramoto
  • Organizer: AOGS 2014
  • Place of Presentation: ロイトン札幌
  • Year and Date: 2014-07-30
• [Presentation] Polymerization of building blocks of life on Europa and other icy moons (2014)
  • Author(s): Jun Kimura, Norio Kitadai
  • Organizer: Origins 2014
  • Place of Presentation: Nara-ken New Public Hall
  • Year and Date: 2014-07-08
• [Presentation] Longevity of an internal ocean in Ganymede (2014)
  • Author(s): Jun Kimura
  • Organizer: JpGU 2014
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2014-04-30
• [Presentation] Development of JUICE/Ganymede Laser Altimeter (GALA) (2014)
  • Author(s): Jun Kimura
  • Organizer: JpGU 2014
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2014-04-30
• [Presentation] Science Targets of JUICE Mission: What we can do in 20 years later ? (2014)
  • Author(s): Sho Sasaki, Yoshifumi Saito, Masaki Fujimoto, Jun Kimura, Yasumasa Kasaba and JUICE JAPAN
  • Organizer: Symposium on Planetary Science 2014
  • Place of Presentation: Sendai
• [Presentation] Photometric Variability of Solar System Solid Objects: Implications for Rocky/Icy Exoplanets (2013)
  • Author(s): Yuka Fujii, Jun Kimura, James Dohm, Makiko Ohtake
  • Organizer: Exoplanets and Disks: Their Formation and Diversity II
  • Place of Presentation: Hawaii, US
• [Presentation] Deep Habitat in the icy moons: structure and evolution of the internal ocean (2013)
  • Author(s): Jun Kimura
  • Organizer: International Astrobiology Workshop 2013, Sagamihara
  • Place of Presentation: Sagamihara
• [Presentation] Research activities on icy and rocky satellites in Japan: Theory, experiments, and explorations (2013)
  • Author(s): Jun Kimura
  • Organizer: JUICE-GALA meeting
  • Place of Presentation: Berlin
• [Presentation] Exploration of Enceladus' Water-rich Plumes Toward Understanding of Chemistry and Biology of the Interior Ocean (2013)
  • Author(s): Yasuhito Sekine, Yoshinori Takano, Hajime Yano, Ryo Funase, Ken Takai, Morio Ishihara, Takazo Shibuya, Shogo Tachibana, Kiyoshi Kuramoto, Hikaru Yabuta, Jun Kimura, Yoshihiro Furukawa
  • Organizer: 29th International symposium on space technology and science
  • Place of Presentation: Nagoya
  • Invited