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arXiv 1111.6309astro-ph.EP
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木星和巨大系外行星的岩石核溶解度

Rocky core solubility in Jupiter and giant exoplanets

Hugh F. Wilson, Burkhard Militzer

摘要:

气体巨星被认为是由氢氦气体在岩石和冰的初始原核周围吸积而形成的。核心的岩石部分是否会在形成后溶解到液态氢氦层中,这个问题对行星的结构和演化有着重要的意义。在这里,我们使用从头计算研究岩石溶解度的流体氢,选择MgO作为行星岩石材料的代表性例子,并发现MgO是高度可溶于H的温度超过约10000 K,这意味着显着的岩石核心材料在木星和更大的系外行星的重新分配。

英文摘要:

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 10000 K, implying significant redistribution of rocky core material in Jupiter and larger exoplanets.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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