2012 Fiscal Year Final Research Report
Central core in satellites: Understanding thermal history, core formation, and origin of intrinsic magnetic field.
| Project/Area Number |
22740285
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Hokkaido University |
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Principal Investigator |
KIMURA Jun 北海道大学, 大学院・理学研究院, 研究員 (00536138)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 惑星科学 / 衛星 / 内部構造 / 磁場 / 進化 / 熱史 |
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| Research Abstract |
The Ganymede’s interior appears to be clearly differentiated and has a metallic core from the gravitational observation and the existence of the intrinsic magnetic field. But because of its smaller size than the terrestrial planets, Ganymede is difficult to form the metallic core just after the end of accretion. This work proposes that dehydration of pristine hydrous rock-metal-mixed core would trigger complete differentiation in the larger moon during the thermal evolution. In a reasonable range of viscosity is assumed for hydrated rocky core, Ganymede experiences the dehydration of the pristine core and possibly the metallic component could segregates from the rocky materials around 2 Gyr after its accretion.
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Research Products
(9 results)
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[Journal Article]2011
Author(s)
Tomokatsu Morota, Jun-ichi Haruyama, Makiko Ohtake, Tsuneo Matsunaga, Chikatoshi Honda, Yasuhiro Yokota, J un K i m ur a , Yoshiko Ogawa, Naru Hirata, Hirohide Demura, Akira Iwasaki, Takamitsu Sugihara, Kazuto Saiki, Ryosuke Nakamura, Shingo Kobayashi, Yoshiaki Ishihara, Hiroshi Takeda, and Harald Hiesinger
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Journal Title
Earth and Planetary Science Letters
Volume: 302
Pages: 255-266
Peer Reviewed
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