论文标题
关于冰棒的内饰的新观点：冰摇滚混合物，而不是岩石顶部的冰
A new perspective on interiors of ice-rich planets: Ice-rock mixture instead of ice on top of rock
论文作者
论文摘要
富含冰的行星是在水冰线的外部形成的，因此有望含有大量的冰。高冰含量会导致内部独特的条件，在该条件下，行星的结构受冰与其他金属相互作用的影响。我们在高压下应用了冰 - 摇滚相互作用的实验数据，并计算详细的热演化，以在超级地球到海王星（5-15个地球质量）的质量范围内可能的富含冰块的行星的内部配置。我们通过包括恒星通量和包膜质量损失的影响来对内向迁移对富含冰块的内部进行建模。我们发现，由于高压在行星内部的大部分时间内，冰和岩石将保持混杂，数十亿年。我们还发现，如果没有发生质量损失，那已经迁移到恒星不同距离的行星双胞胎的深内部通常相似。巨大的质量损失导致水与表面上的岩石分离，而挥发性大气的出现不到地球质量的1％。水/蒸汽大气的质量受冰 - 摇滚相互作用的限制。我们得出的结论是，当行星内部冰丰富时，行星结构可能与岩石芯顶部的水壳的标准分层结构有显着差异。预计在近距离行星和较远的行星中都有类似的结构。
Ice-rich planets are formed exterior to the water ice-line and thus are expected to contain a substantial amount of ices. The high ice content leads to unique conditions in the interior, under which the structure of a planet is affected by ice interaction with other metals. We apply experimental data of ice-rock interaction at high pressure, and calculate detailed thermal evolution for possible interior configurations of ice-rich planets, in the mass range of super-Earth to Neptunes (5-15 Earth masses). We model the effect of migration inward on the ice-rich interior by including the influences of stellar flux and envelope mass loss. We find that ice and rock are expected to remain mixed, due to miscibility at high pressure, in substantial parts of the planetary interior for billions of years. We also find that the deep interior of planetary twins that have migrated to different distances from the star are usually similar, if no mass loss occurs. Significant mass loss results in separation of the water from the rock on the surface and emergence of a volatile atmosphere of less than 1 percent of the planet's mass. The mass of the atmosphere of water/steam is limited by the ice-rock interaction. We conclude that when ice is abundant in planetary interiors the planet structure may differ significantly from the standard layered structure of a water shell on top of a rocky core. Similar structure is expected in both close-in and further-out planets.
