f and g series solutions to a post-Newtonian two-body problem with parameters β and γ  

作　　者：Song-He Qin Jing-Xi Liu Ze-Hao Zhong Yi Xie 

机构地区：[1]School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China [2]Shanghai Key Laboratory of Space Navigation and Position Techniques, Shanghai 200030, China [3]Key Laboratory of Modern Astronomy and Astrophysics, Nanjing University, Ministry of Education, Nanjing 210093, China

出　　处：《Research in Astronomy and Astrophysics》2016年第1期135-144,共10页天文和天体物理学研究（英文版）

基　　金：funded by the National Natural Science Foundation of China (Grant No.J1210039);the Fundamental Research Funds for the Central Universities (Grant No.20620140586);the Opening Project of Shanghai Key Laboratory of Space Navigation and Position Techniques (Grant No.14DZ2276100)

摘　　要：Classical Newtonian f and g series for a Keplerian two-body problem are extended for the case of a post-Newtonian two-body problem with parameters β and γ. These two parameters are introduced to parameterize the post-Newtonian approximation of alternative theories of gravity and they are both equal to1 in general relativity. Up to the order of 30, we obtain all of the coefficients of the series in their exact forms without any cutoff for significant figures. The f and g series for the post-Newtonian two-body problem are also compared with a Runge-Kutta order 7 integrator. Although the f and g series have no superiority in terms of accuracy or efficiency at the order of 7, the discrepancy in the performances of these two methods is not quite distinct. However, the f and g series have the advantage of flexibility for going to higher orders.Some examples of relativistic advance of periastron are given and the effect of gravitational radiation on the scheme of f and g series is evaluated.Classical Newtonian f and g series for a Keplerian two-body problem are extended for the case of a post-Newtonian two-body problem with parameters β and γ. These two parameters are introduced to parameterize the post-Newtonian approximation of alternative theories of gravity and they are both equal to1 in general relativity. Up to the order of 30, we obtain all of the coefficients of the series in their exact forms without any cutoff for significant figures. The f and g series for the post-Newtonian two-body problem are also compared with a Runge-Kutta order 7 integrator. Although the f and g series have no superiority in terms of accuracy or efficiency at the order of 7, the discrepancy in the performances of these two methods is not quite distinct. However, the f and g series have the advantage of flexibility for going to higher orders.Some examples of relativistic advance of periastron are given and the effect of gravitational radiation on the scheme of f and g series is evaluated.

关 键 词：gravitation - celestial mechanics - binaries： general 

分 类 号：P13[天文地球—天体力学]