基于天体测量法探测系外行星的仿真模拟与轨道求解算法

发布时间：2018-04-25 10:49

本文选题：天体测量学 + 行星与卫星　；参考：《天文学报》2016年05期

【摘要】：天体测量法是探测系外行星一种有效的手段,具有其他探测方法所不具备的独特优势,如可以探测到行星的3维轨道参数及确定行星的质量等,这些将为现有的行星样本提供重要补充.高精度的空间天体测量卫星Gaia(Global Astrometric Interferometer for Astrophysics)在2013年成功发射升空,可以预期未来基于其探测数据,将可能发现大量的长周期类木行星.针对αCentauri A、HD 62509和GJ 876系统,根据Gaia单次天体测量精度生成对应的仿真数据,使用Lomb-Scargle周期谱分析行星轨道周期信号,并采用Markov Chain Monte Carlo(MCMC)算法对行星系统进行轨道反演,得到的结果与行星的初始参数相吻合.
[Abstract]:Astrometry is an effective method for the detection of exoplanets. It has unique advantages that other methods do not have, such as the ability to detect the three-dimensional orbital parameters of planets and to determine the mass of planets, etc. These will provide an important complement to existing planetary samples. The launch of the high-precision space astrometric satellite Gaia(Global Astrometric Interferometer for Astros in 2013 could be expected to see the discovery of a large number of long-period wood-like planets in the future, based on its exploration data. For the 伪 Centauri Agna HD 62509 and GJ876 systems, the corresponding simulation data are generated according to the accuracy of Gaia single astrometry, and the periodic signals of planetary orbits are analyzed by Lomb-Scargle periodic spectrum, and the orbit inversion of the planetary system is carried out by Markov Chain Monte algorithm. The results are in agreement with the initial parameters of the planet.
【作者单位】：中国科学院紫金山天文台;中国科学院行星科学重点实验室;中国科学院大学;
【基金】：国家自然科学基金项目(11273068,11473073) 中国科学院战略性先导科技专项(XDB09000000);中国科学院空间科学战略性先导科技专项(XDA04060900);中国科学院新兴与交叉学科布局试点项目(KJZD-EW-Z001) 紫金山天文台小行星基金会资助
【分类号】：P15;P172

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