天体测量法探测系外行星  

Exoplanet Detection by Astrometric Method

作　　者：许伟维 廖新浩[1,3] 周永宏[1,3] 许雪晴[1,3] 

机构地区：[1]中国科学院上海天文台,上海200030 [2]上海科技大学物质学院,上海201210 [3]中国科学院行星科学重点实验室,上海200030 [4]中国科学院大学,北京100049

出　　处：《天文学报》2016年第4期422-436,共15页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(11133004);中国科学院先导B项目(XDBO9000000)资助

摘　　要：在目前已发现的系外行星中,绝大多数是由视向速度法和凌星法探测得到的,天体测量法仅发现了1颗.gaia卫星数据即将发布,天体测量法将逐步成为系外行星探测的重要方法之一.基于天体测量法给出的恒星位置参数序列,讨论了在求解行星质量和轨道参数时涉及的动力学条件方程计算问题,给出了具体微分改正公式,同时也进行了必要的仿真模拟计算.建立的方法可以较容易地推广到多行星系统.As we known, the exoplanets are mostly detected by the methods of radial velocity and transit, only one is found by the astrometric method. As the data of the gaia to be released, astrometry will become one of the most important method for detecting exoplanets gradually. Based on the position sequence of stars, this paper discusses the calculation of the equations of dynamics conditions involved in solving the mass and the orbit parameters of the planet. Due to the deficiency of the available theory （orbital element method）, we put forward a new method （coordinate velocity method）. The differential correction formulae of the two methods are presented, as well as the necessary simulation. In addition, the method established in this paper can be applied to the multi-planet system easily.

关 键 词：系外行星 天体测量学 天体力学 轨道计算与定轨 方法 数据分析 

分 类 号：P135[天文地球—天体力学]