面向脉冲星时的原子钟钟差研究  

Research on atomic clock comparison for pulsar time

作　　者：黄玉祥 李柯伽 郝龙飞[1,3] 李志玄[1,3] 徐永华[1,3] 沈发新 汪敏[1,3] 程向明[1,2,3,6] HUANG Yu-xiang;LEEKe-jia;HAO Long-fei;LI Zhi-xuan;XU Yong-hua;SHEN Fa-xin;WANG Min;CHENG Xiang-ming(Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory for the Structure and Evolution of Celestial Objects,Chinese Academy of Sciences,Kunming 650216,China;Department of Astronomy,School of Physics,Peking University,Beijing 100871,China;National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;Engineering Laboratory on Applied Astronomical Technology of Yunnan,Kunming 650216,China)

机构地区：[1]中国科学院云南天文台,昆明650216 [2]中国科学院大学,北京100049 [3]中国科学院天体结构与演化重点实验室,昆明650216 [4]北京大学物理学院天文系,北京100871 [5]中国科学院国家天文台,北京100101 [6]云南省应用天文技术工程实验室,昆明650216

出　　处：《时间频率学报》2023年第3期206-216,共11页Journal of Time and Frequency

基　　金：国家SKA计划资助项目(2020SKA0120100);云南省科技厅对外科技合作专项资助项目(02003AD150010);国家重点研发计划资助项目(2022YFC2205203);国家自然科学基金资助项目(12073076,12173087,12041303,12063003)。

摘　　要：毫秒脉冲星是宇宙中稳定的“天然时钟”。毫秒脉冲星这一特性可用于建立新的时间保持基准,通过协同原子钟的短期稳定性,形成长期稳定的脉冲星时。利用40 m射电望远镜,通过观测若干颗毫秒脉冲星,研究人员开展了脉冲星计时和脉冲星钟方面的研究。目前,已经完成了相关实验平台的搭建、原子钟之间的长期比对和钟差外推等实验,成功地将贝叶斯方法应用于钟差谱估计,初步实现了钟差信号的最优估计和外推。Millisecond pulsars are the stable“celestial clock”.Based on the properties of millisecond pulsars,a new pulsar-based time scale can be established to maintain a long-term stable timescale.Pulsar timing and pulsar clocks are investigated with several millisecond pulsars,using the Kunming 40-meter radio telescope.We had built the experimental platform of pulsar clock and carried out experiments including comparison of atomic clocks and forecast of clock differences.The validation of the Bayesian approach in clock difference spectrum estimation was verified that is proved as an effective method for clock difference estimation and extrapolation.

关 键 词：毫秒脉冲星 脉冲星钟 贝叶斯估计 

分 类 号：P127.1[天文地球—天体测量]