摘要
本研究使用中国科学院新疆天文台南山26 m射电望远镜2000.01—2014.02和2018.01—2023.02的计时观测数据,应用频率论方法对脉冲星PSR J0454+5543(B0450+55)进行了计时分析研究。获得脉冲星PSR J0454+5543更新的重要基本参数分别是赤经04:54:07.808(6)(h:m:s),赤纬+55:43:41.36(8)(°:′:″),自转频率2.9348698107(12)Hz,自转频率一阶导数-2.0542(7)×10^(-14)s^(-2),赤经每年自行49(7)毫角秒和赤纬每年自行-9(12)毫角秒。同时,本工作还研究了脉冲星PSR J0454+5543的自转随时间的演化情况,其自转频率随时间的演化比较均匀,与自转减慢模型符合较好;其自转频率的一阶导数在-2.05×10^(-14)s^(-2)数值附近有微小起伏,这种微小的起伏可能是由于自转频率一阶导数本身的随机变化,也可能是由于观测数据本身的信噪比导致。通过对该脉冲星自转稳定性参数σ_(Z)的测量,可以看出脉冲星PSR J0454+5543表现出了较好的守时性。
We conducted a frequentist-based timing analysis of pulsar PSR J0454+5543(B0450+55)using timing observation data from the Nanshan 26-meter radio telescope at Xinjiang Astronomical Observatory,Chinese Academy of Sciences.The time spans were from January 2000 to February 2014 and from January 2018 to February 2023.This study has obtained updated key parameters for PSR J0454+5543:right ascension 04:54:07.808(6)(h:m:s),declination+55:43:41.36(8)(°:′:″),rotational frequency 2.9348698107(12)Hz,first frequency derivative−2.0542(7)×10^(-14)s^(-2),proper motion in right ascension 49(7)mas per year,and proper motion in declination−9(12)mas per year.The study has concurrently captured the pulsar’s rotational evolution over time,revealing a relatively steady spin-down behavior consistent with conventional slowdown models.The first frequency derivative exhibits minor fluctuations around-2.05×10^(-14)s^(-2),which may originate from either intrinsic variations in the spin-down parameter or signal-to-noise limitations in the observational data.Through measurements of the rotational stability parameter σ_(Z),PSR J0454+5543 has demonstrated good timekeeping performance.
作者
李喜艳
陶骏戈
丘昆阳
杨可
李琳
LI Xiyan;TAO Junge;QIU Kunyang;YANG Ke;LI Lin(School of Physical Science and Technology,Xinjiang University,Urumqi 830017,China;Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China;College of Physics and Electronic Science,Guizhou Normal University,Guiyang 550001,China)
出处
《湖南文理学院学报(自然科学版)》
2026年第1期7-13,43,共8页
Journal of Hunan University of Arts and Science(Science and Technology)
基金
国家重点研发计划项目(2022YFC2205200)。
