AI 中文总结
研究岩石系外行星表面成分，通过多种岩石成分的总元素丰度构建地壳 - 大气模型，研究特定温度和压力下大气成分与矿物成分的联系，揭示23种矿物与其大气类型的关联，可据此限制矿物硫化学和铁氧化态。
AI 中文摘要
背景：有大量大气的岩石系外行星的地壳成分无法直接观测。但近期发展使观测和表征其大气成为可能，了解大气与地壳的联系有助于根据大气观测推断地壳成分。目的：旨在理解特定凝析物的热稳定性与大气成分之间的联系，通过潜在可观测的大气特征来限制表面的矿物成分，为此进行了大气和地壳成分的网格研究。方法：以多种岩石成分激发的不同总元素丰度作为地壳 - 大气模型的成分基础，假设热化学和相平衡，研究500K至1000K的温度范围和1巴的表面压力，根据大气中最丰富的气相元素C、H、N、O和S对所得大气成分进行分类。结果：表面矿物学的一些变化与大气类型的变化一致，与给定的总元素丰度无关。总共揭示了23种热稳定矿物与其相应大气类型之间的联系，这与难熔元素的比例无关。特别是，矿物的硫化学和平均铁氧化态可由相应的大气类型来限制。
英文摘要
Context. The crust composition of rocky exoplanets with a substantial atmosphere can not be observed directly. However, recent developments are starting to allow for the observation and characterisation of their atmospheres. Understanding the link between atmospheres and crusts could allow for constraints on the crusts' composition based on atmospheric observations. Aims. We aim to understand the link between the thermal stability of specific condensates and atmospheric compositions. This allows constraints on the mineralogical composition of the surface by potentially observable atmospheric features. In order to achieve this, a grid study of atmospheric and crustal compositions is conducted. Methods. We use a diverse range of total element abundances inspired by various rock compositions as the compositional base for our crust-atmosphere models, for which thermo-chemical and phase equilibrium is assumed. In this work, we investigate a temperature range of 500 K to 1000 K and a surface pressure of 1 bar. The resulting atmospheric compositions are classified using atmospheric types based on the most abundant gas-phase elements C, H, N, O, and S. Results. Some of the changes in surface mineralogy coincide with changes in atmospheric type, independent of the given total elemental abundances. In total, a link has been revealed between 23 thermally stable minerals and their corresponding atmospheric types, which is independent of the ratio of the refractory elements present. Especially, the sulphur chemistry of the minerals and the average iron oxidation state can be constrained by the corresponding atmospheric type.
