摘要
在脉冲双星系统中,Römer延迟修正项是指由于脉冲星的轨道运动,引起脉冲信号到达地球的时间变化。本文中考虑了包含自旋与轨道耦合作用下的二阶后牛顿运动方程,在此基础上推导了新的Römer延迟修正表达式,并给出了自旋对Römer延迟影响的量级分析。新的Römer延迟修正考虑了脉冲星自旋对其轨道运动的影响,这为更高精度的脉冲射电天文观测和引力检验提供了理论基础。
In pulsar binary systems,the Römer delay correction refers to the variation in the time it takes for pulsar signals to reach Earth due to the orbital motion of the pulsar.This paper considers the second-order post-Newtonian equations of motion that include the coupling effects of spin and orbit.Based on this,it derives a new expression for the Römer delay correction and provides a magnitude analysis of the impact of spin on the Römer de-lay.The new Römer delay correction takes into account the influence of the pulsars spin on its orbital motion,providing a theoretical basis for more precise pulsar radio astronomi-cal observations and tests of gravity.
作者
张阳光
司徒亨健
杨波
林文斌
ZHANG Yangguang;SITU Hengjian;YANG Bo;LIN Wenbin(School of Physical Science and Technology,Southwest Jiaotong University,Chengdu,Sichuan 610031,China;School of Mathematics and Physics,University of South China,Hengyang,Hunan 421001,China)
出处
《南华大学学报（自然科学版）》
2024年第2期60-65,共6页
Journal of University of South China：Science and Technology
基金
国家自然科学基金项目(11973025,12303079)
湖南省教育厅项目(22B0446)。
关键词
后牛顿近似
双星系统
脉冲星
时间模型
post-Newtonian approximation
binary system
pulsar
timing model
