基于热木星的观测特征追溯其形成演化历史

本项目中我们将研究系外行星中热木星的形成演化过程。结合观测得到的热木星的碳氧丰度比数据，综合考虑盘模型、轨道迁移因素的影响，通过数值模拟、理论分析获得热木星的形成演化历史。这是行星形成演化理论中的重要问题之一，也是现代天体力学研究中的前沿问题。本项目通过观测和理论研究的结合，将对目前存在争议的轨道迁移速度提供合理范围；对热木星形成过程中需要的盘模型进行限定；揭示在热木星形成过程中碰撞合并过程以及气体吸积过程对最终行星质量、大小、位置及其大气组成成分等参数的影响。这些结果有助于进一步完善行星形成理论，加深对太阳系和系外行星形成的理解。通过本项目的实施和创新性工作的完成，力争提高我国在系外行星观测和理论研究方面的国际影响力。

In this project, we study the formation and evolution of hot Jupiters mainly considering the influence of the disk model and orbital migration. Comparing the results from the simulations with the observation, we will get the formation history of the hot Jupiters. It is one of the important questions in the theory of planetary formation and it is also one of the topics at the forefront in the field of modern celestial mechanics research. Through this project, we will obtain reasonable speed of orbital migration and disk model, will get the influence of the collision process and gas accretion process on the final planet masses, sizes, locations and the compositions of the chemical elements in the hot Jupiters. Our works will be helpful to improve the theory of planetary formation and deepen the understanding on the dynamics and formation of solar system and the exoplanetary systems. Implement of this project and innovative works will improve the international influence in the fields of the observation and theoretical research.