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arXiv 0911.3154astro-ph.EP
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巨行星内部结构与热演化

Giant Planet Interior Structure and Thermal Evolution

Jonathan J. Fortney, Isabelle Baraffe, Burkhard Militzer

摘要:

我们讨论了巨行星的内部结构和组成,以及随着这些行星随着时间的推移冷却和收缩,这种结构如何变化。在这里,我们将巨行星定义为具有可观测到的氢氦包层的行星,其中包括主要由H/He气体组成的类海王星行星,以及主要由比H/He重的元素组成的类海王星行星。介绍了行星物质的状态方程,静态结构模型和热演化模型的建立。我们将这些模型应用于靠近母恒星的凌日行星,以及远离母恒星的直接成像行星。已经假设膨胀的近距离过境行星的半径的机制进行了讨论。我们还回顾了从太阳系巨行星的研究中获得的知识。巨行星物理学的前沿讨论着眼于未来的行星发现。

英文摘要:

We discuss the interior structure and composition of giant planets, and how this structure changes as these planets cool and contract over time. Here we define giant planets as those that have an observable hydrogen-helium envelope, which includes Jupiter-like planets, which are predominantly H/He gas, and Neptune-like planets which are predominantly composed of elements heavier than H/He. We describe the equations of state of planetary materials and the construction of static structural models and thermal evolution models. We apply these models to transiting planets close to their parent stars, as well as directly imaged planets far from their parent stars. Mechanisms that have been postulated to inflate the radii of close-in transiting planets are discussed. We also review knowledge gained from the study of the solar system's giant planets. The frontiers of giant planet physics are discussed with an eye towards future planetary discoveries.

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