2019 Fiscal Year Final Research Report
A model for formation and evolution of solid materials in space based on 3D structures of solar primitive materials.
| Project/Area Number |
15H05695
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| Research Category |
Grant-in-Aid for Specially Promoted Research
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
Mathematics and Physics
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| Research Institution | Ritsumeikan University (2019-2020)
Kyoto University (2015-2018) |
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Principal Investigator |
TSUCHIYAMA Akira 立命館大学, 総合科学技術研究機構, 教授 (90180017)
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| Co-Investigator(Kenkyū-buntansha) |
UESUGI Kentaro (財)高輝度科学研究センター, 研究利用促進部門, 研究員 (80344399)
MATSUMOTO Megumi 東北大学, 大学院理学研究科, 助教 (50725455)
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| Research Collaborator |
MIYAKE Akira
TAKIGAWA Aki
MATSUNO Junya
IGAMI Yohei
KIM Taehee
VACCARO Epifanio
NAKOTO Aiko
ENJU Satomi
ZOLENSKY Michael
NKAMURA-MESSENGER Keiko
WATANABE Takayuki
WATANABE Naoki
ITO Motoo
CHIHARA Hiroki
ABE Masanao
TAKAYAMA Akiko
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| Project Period (FY) |
2015 – 2020
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| Keywords | 太陽系始原物質 / 彗星塵 / 炭素質コンドライト / 凝縮 / 宇宙風化 / 水質変成 / ナノX線CT / はやぶさ2 |
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| Outline of Final Research Achievements |
We successfully performed reproduction experiments of cometary materials and showed the importance of condensation from high-temperature gas as the major production process for solid materials in circumstellar and protoplanetary disk. We also elucidated alteration processes as the evolution of solid materials, such as the production of water (hydroxyl) by space weathering, early process of aqueous alteration in small bodies and space weathering process including abrasion on small body surfaces.
We have applied multi-scale 3D analytical protocols to primitive materials of the solar system (cometary dust and carbonaceous chondrites) and discovered“fossile ice” and CO2-bearing fluid inclusion, which showed the evidence for recent dynamic solar system formation model.
Based on the results, we proposed a new model on the formation and evolution of the solids in the early solar system. We have also prepared for the initial analysis of Hayabusa2 samples by nanoXCT by performing rehearsal analysis using analogue samples.
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| Academic Significance and Societal Importance of the Research Achievements |
上述の成果より、新しい太陽系始原物質生成・進化モデル(太陽系始原物質は局所的な加熱プロセスにより初期太陽系内の様々な領域で形成されたのち変成を受け、現在の小惑星や彗星の構成物質となった)を提唱した。また、JAXAの小惑星サンプルリターン計画である「はやぶさ2」に関して、模擬サンプルを用いたナノX線CTのリハーサル分析をおこない、初期分析の準備を整えた。
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| Free Research Field |
地球惑星科学
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