Rocky core solubility in Jupiter and giant exoplanets.

Rocky core solubility in Jupiter and giant exoplanets.
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木星和巨型系外行星中的岩石核心溶解度。

DOI:
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发表时间:
2011
影响因子:
8.6
通讯作者:
B. Militzer
B. Militzer
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
H. Wilson;B. Militzer

文献摘要

被引文献

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气态巨行星被认为是由氢氦气在岩石和冰的初始原核周围吸积而形成的。地核的岩石部分在形成后是否溶解到流体 H-He 层中的问题对于行星结构和演化具有重要意义。在这里,我们使用从头计算来研究岩石在液态氢中的溶解度,选择 MgO 作为行星岩石材料的代表例子,并发现 MgO 在超过约 10,000 K 的温度下在 H 中高度溶解,这意味着木星和更大的系外行星中岩石核心材料有可能发生显着的重新分布。
Gas giants are believed to form by the accretion of hydrogen-helium gas around an initial protocore of rock and ice. The question of whether the rocky parts of the core dissolve into the fluid H-He layers following formation has significant implications for planetary structure and evolution. Here we use ab initio calculations to study rock solubility in fluid hydrogen, choosing MgO as a representative example of planetary rocky materials, and find MgO to be highly soluble in H for temperatures in excess of approximately 10,000 K, implying the potential for significant redistribution of rocky core material in Jupiter and larger exoplanets.