Impact fragmentation and re-accumulation of iron meteorite parent bodies : Implication for energy fraction of iron core in collisional disruption.

铁陨石母体的撞击破碎和再积累：碰撞破坏中铁芯能量分数的含义。

• 批准号: 21840064
• 负责人: OKAMOTO Chisato
• 金额: $ 1.56万
• 依托单位: Japan Aerospace Exploration Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Research Activity Start-up
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21840064/
• 关键词: 惑星起源; 進化; 惑星起源・進化

The collisional processes of differentiated parent bodies in the solar nebula play an important role to clarify the origin of iron meteorites and M-type asteroids. We conducted impact experiments on metal core-rocky mantle targets simulating iron meteorite parent bodies in order to study the collisional disruption and the formation condition of differentiated meteorite such as irons. We investigated the impact fragmentation and re-accumulation of the core-mantle bodies with different core/target mass ratios. We estimated the energy density partitioned into the core and the mantle using the energy fraction to clarify the internal structure is a crucial parameter to control the collisional outcomes of the core-mantle bodies.

太阳星云中不同母体的碰撞过程对阐明铁陨石和M-型小行星的起源起着重要作用。为了研究铁陨石等分化陨石的碰撞破裂和形成条件，模拟铁陨石母体，对金属核-岩石地幔靶进行了碰撞实验。我们研究了不同核靶质量比的核幔体的撞击碎裂和再聚集。利用能量分数估算了划分到核幔中的能量密度，阐明了核幔内部结构是控制核幔碰撞结果的重要参数。

项目成果

分化天体からの鉄隕石放出条件の解明

分异天体释放铁陨石的条件的阐明

• 发表时间: 2011
• 作者: 岡本千里;荒川政彦;長谷川直;田端誠
• 通讯作者: 田端誠

Impact Fragmentation of Iron meteorite parent bodies : Implication for Energy fraction of Iron core in Collisional disruption

铁陨石母体的撞击破碎：碰撞破坏中铁核能量分数的影响

• 发表时间: 2010
• 期刊: Proceedings of 41^<st> Lunar and Planetary Science Conference
• 作者: C.Okamoto;M.Arakawa;S.Hasegawa
• 通讯作者: S.Hasegawa

Impact experiments of metal core-rocky malltle targets simulating collisional disruption of iron meteorite parent bodies.

模拟铁陨石母体碰撞破坏的金属核-岩石锤靶的撞击实验。

• 发表时间: 2011
• 作者: C.Okamoto.;M.Arakawa;S.Hasegawa
• 通讯作者: S.Hasegawa

分化天体の衝突破壊および鉄阻石放出の解明

阐明分化天体的碰撞破坏和铁矿石的释放

• 发表时间: 2010
• 作者: 岡本千里;荒川政彦;長谷川直;田端誠
• 通讯作者: 田端誠

Impact fragmentation of iron meteorite parent bodies : Implication for energy fraction of iron core in collisional diaruption.

铁陨石母体的撞击破碎：碰撞破裂中铁核能量分数的含义。

• 发表时间: 2010
• 作者: 岡本千里;政彦荒川;長谷川直
• 通讯作者: 長谷川直