| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
Some bodies in the solar system have a magnetic field like the earth, and another bodies once had. The magnetic field of an Earth-like rock body originates from a dynamo driven by thermo-compositional convection of the liquid core. The lifetime of the magnetic field depends on how the compositional convection of the liquid Fe-alloy caused by the cooling of the core works. We have clarified how the compositional convection pattern of the Fe-FeS core changes depending on the chemical composition and pressure. It was found that relatively small bodies such as the Earth’s moon solidify mainly from the top of the liquid core, resulting in compositional convection.
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