地球与行星物理论评（中英文）2024，Vol.55Issue(5)：552-562,11.DOI:10.19975/j.dqyxx.2024-001
类地行星低阶重力场、自转与内部圈层结构研究进展
An overview and perspective of terrestrial planets'low-degree gravity field,rotation,and interior structure
摘要
Abstract
The low-degree gravity field and rotation parameters of terrestrial planets are functions of the plan-et's interior structure,providing insights into their composition and evolution,which serves them as crucial targets throughout deep-space exploration.Particularly,the measurement of rotation state can directly reveal the density and size of most untouchable planetary core.With the accumulation of data and the recent high-precision deep-space missions,substantial scientific advances have been achieved in understanding the internal structure of ter-restrial planets,especially the core,using the low-degree gravity field and rotation measurements.In this study,we provide a summary of the fundamental theory and method for determining the principal moment of inertia tensor of planets,and then the basic theory of planetary rotation dynamics and rotational normal modes closely related to in-ternal structures,and the methods for solving principal moments of inertia tensors of planets using the low-degree gravitational potential coefficients.We review the up-to-date researches on determining the mean bulk density and mean moment of inertia factor through limited rotation observations and the low-degree gravity field measure-ments,and the basic approaches to invert interior structures.Finally,we present existing challenges in revealing in-terior structures from low-degree gravity field and rotation normal modes for terrestrial planets and asteroids with a hope to provide scientific references and theoretical support for Chinese future deep-space missions.关键词
类地行星/内部结构/自转动力学/低阶重力场/行星核大小和密度Key words
terrestrial planets/interior structure/rotational dynamics/low-degree gravity field/planetary core size and density分类
地球科学引用本文复制引用
徐长仪,万妍,姜衍,魏勇..类地行星低阶重力场、自转与内部圈层结构研究进展[J].地球与行星物理论评（中英文）,2024,55(5):552-562,11.基金项目
国家重点研发计划项目(2022YFF0503200) （2022YFF0503200）
国家自然科学基金资助项目(42274114)Supported by the National Key Research and Development Program(Grant No.2022YFF0503200)and the National Natural Sci-ence Foundation of China(Grant No.42274114) （42274114）
