矮行星地壳中的热对流（1）谷神星
Thermal convection in the crust of the dwarf planet (1) Ceres
摘要：
谷神星是主带中最大的天体，其特点是内部有大量的水冰。这一特点是由其相对较低的体积密度（2162公斤米$^{-3}$），而它的部分分化成一个岩石核和冰壳建议由几个地质和地球化学特征：矿物和盐产生的水蚀变，表面上的冰补丁，叶状形态解释为表面流。在这项工作中，我们将探讨如何组合物可以影响谷神星的地壳中的热对流的特性。我们的研究结果表明，热对流的发生是困难的，当它发生时，它是短暂的，这可能意味着谷神星保存深层液体，直到现在，最近的工作Castillo-Rogez等人。此外，冰火山活动可能是由底辟作用（化学对流）而不是热对流驱动的。
英文摘要：
Ceres is the largest body in the Main Belt, and it is characterized by a large abundance of water ice in its interior. This feature is suggested by its relatively low bulk density (2162 kg m$^{-3}$), while its partial differentiation into a rocky core and icy crust is suggested by several geological and geochemical features: minerals and salts produced by aqueous alteration, icy patches on the surface, lobate morphology interpreted as surface flows. In this work we explore how the composition can influence the characteristics of thermal convection in the crust of Ceres. Our results suggest that the onset of thermal convection is difficult and when it occurs it is short lived and this could imply that Ceres preserved deep liquid until present, as recent suggested by the work of Castillo-Rogez et al.. Moreover, cryovolcanism could be driven by diapirism (chemical convection) rather than thermal convection.
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