类地行星核心的物理性质和组成

Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu Pub Date : 2020-01-01 DOI:10.4131/jshpreview.30.111

H. Terasaki

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引用次数: 0

摘要

为了约束类地行星的核心成分，测量了液体FeNiS和FeNiSi合金的声速和密度，最高可达14 GPa。S的加入降低了液态FeNi的纵波速度和体积模量，而Si的加入提高了液态Fe的纵波速度，但在当前压力范围内对体积模量没有影响。根据获得的液态FeNiS和FeNiSi的弹性性质，将行星大地测量数据与37 wtS或wt进行匹配，估计了行星核的成分

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Physical Properties and Composition of Cores of Terrestrial Planets

of Terrestrial Planets 寺崎英紀 Hidenori TERASAKI To constrain the core compositions of terrestrial planets, sound velocity and density of liquid Fe  Ni  S and Fe  Ni  Si alloys were measured up to 14 GPa. Addition of S reduces the P-wave velocity and bulk modulus of liquid Fe  Ni while addition of Si rises the P-wave velocity and does not affect on the bulk modulus in the present pressure range. Based on the obtained elastic properties of liquid Fe  Ni  S and Fe  Ni  Si, the compositions of planetary cores are estimated by matching the planetary geodesy data to 3  7 wt  S or wt

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