论文标题
迈向巨型系外行星特征的新时代
Towards a new era in giant exoplanet characterisation
论文作者
论文摘要
确定巨型系外行星的组成对于理解其起源和进化至关重要。但是，行星散装的组成不是直接测量的，但必须从大摩尔迪乌斯测量，行星年龄和进化模拟的结合中得出。从即将到来的任务中准确确定恒星年龄，质量拉迪乌斯和大气组成可以显着改善巨型行星中重元素质量的确定。在本文中，我们首先证明了柏拉图预期的准确年龄测量在限制行星特性中的重要性。确定的恒星年龄可以将散装金属不确定性降低到大约两倍。接下来，我们从Ariel任务参考样本中推断出温暖巨人的大量金属性，并确定Ariel的高优先级目标，其中测得的大气金属性可以清楚地破坏推断的组成中的退化。我们表明，对大气金属性的知识可以将大量金属不确定性大致减少4到8倍。我们得出的结论是，Ariel和James Webb太空望远镜从柏拉图和大气测量中的准确确定将在揭示巨型系外行星的组成方面发挥关键作用。
Determining the composition of giant exoplanets is crucial for understanding their origin and evolution. However, the planetary bulk composition is not measured directly but must be deduced from a combination of mass-radius measurements, knowledge of the planetary age and evolution simulations. Accurate determinations of stellar ages, mass-radius, and atmospheric compositions from upcoming missions can significantly improve the determination of the heavy-element mass in giant planets. In this paper, we first demonstrate the importance of an accurate age measurement, as expected from Plato, in constraining the planetary properties. Well-determined stellar ages can reduce the bulk-metallicity uncertainty up to about a factor of two. We next infer the bulk metallicity of warm giants from the Ariel mission reference sample and identify the Ariel high-priority targets for which a measured atmospheric metallicity can clearly break the degeneracy in the inferred composition. We show that knowledge of the atmospheric metallicity can broadly reduce the bulk-metallicity uncertainty by a factor of four to eight. We conclude that the accurate age determination from Plato and atmospheric measurements by Ariel and the James Webb Space Telescope will play a key role in revealing the composition of giant exoplanets.
