太阳系内类地行星内部结构模型研究进展

On the Study of the Interior Structure of Terrestrial Planets in Solar System

主要介绍太阳系内类地行星的内部结构模型研究进展。首先介绍了类地行星内部结构模型的研究方法:假定行星处于流体静平衡态,将其由球心至外沿半径方向分成一系列的同心球壳层,根据物理模型建立内部压强、质量、引力的一系列微分方程,由边界条件进行数值积分;或根据地震学、测地学、电磁学数据进行贝叶斯反演,得到内部结构模型。然后以火星为例简述了类地行星的探测情况、内部模型研究现状以及现有约束条件,如火星重力场、潮汐LOVE数等测地学数据对内部结构模型的影响。最后对内部结构模型研究发展做了简单的展望。

The interior structure of terrestrial planets is fundamental to the understanding of the solar system and for the comprehension of the formation and evolution of those planets. Furthermore, knowledge about terrestrial planets provides important insights to the understanding of the future evolution of the Earth. Here two methods, forward method and Bayesian Inversion, which construct interior structure models applicable to terrestrial planets are introduced. In order to get the detail interior structure model, planets are divided into three parts： crust, mantle and core, and each part has its own composition. And then, the study of the Martian interior structure is reviewed as an example. In particular the geodesy data of the Mars, such as Love number, gravity field, and their constraints on the models are also introduced in detail in this paper. At the end of this paper, the prospect of the study of the interior structure of the terrestrial planets is presented.