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首页> 美国卫生研究院文献>Proceedings of the Japan Academy. Series B Physical and Biological Sciences >Asymmetric shock heating and the terrestrial magma ocean origin of the Moon
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Asymmetric shock heating and the terrestrial magma ocean origin of the Moon

机译：非对称激波加热与月球陆地岩浆海洋的起源

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摘要

One of the difficulties of the current giant impact model for the origin of the Moon is to explain the marked similarity in the isotopic compositions and the substantial differences in the major element chemistry. Physics of shock heating is analyzed to show that the degree of heating is asymmetric between the impactor and the target, if the target (the proto-Earth) had a magma-ocean but the impactor did not. The magma ocean is heated much more than the solid impactor and the vapor-rich jets come mainly from the magma-ocean from which the Moon might have been formed. In this scenario, the similarity and differences in the composition between the Moon and Earth would be explained as a natural consequence of a collision in the later stage of planetary formation. Including the asymmetry in shock heating is the first step toward explaining the chemical composition of the Moon.
机译：当前关于月球起源的巨大撞击模型的困难之一是解释同位素组成的显着相似性以及主要元素化学上的实质差异。分析了冲击加热的物理过程，发现如果目标（原始地球）有岩浆海洋但冲击器没有，则冲击器和目标之间的加热程度是不对称的。岩浆海洋比固体撞击器受热得多，富蒸气的喷流主要来自可能形成月球的岩浆海洋。在这种情况下，月球和地球之间组成的相似性和差异将被解释为行星形成后期碰撞的自然结果。包括激波加热中的不对称性是解释月球化学成分的第一步。

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