| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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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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