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计时噪声对脉冲星钟模型参数的精确测定和计时精度有重要影响,本文将sz(t)方法与经验模态分解方法相结合,用于毫秒脉冲星计时噪声的识别与提取,并以具有代表性的两颗毫秒脉冲星PSR J0437-4715和PSR J1939+2134为例进行实验与分析。结果表明:经验模态分解方法能够用于毫秒脉冲星计时噪声的白化,对于计时噪声占主导的毫秒脉冲星,经过白化后其计时残差精度有显著提高。
Abstract：Timing noise has a significant influence on the precise measurement for clock model parameters and timing accuracy of the pulsar.In this paper a method combining the sz(t) with the empirical mode decomposition is used to distinguish and extract timing noises of millisecond pulsars.PSR J0437-4715 and PSR J1939+2134, two typical millisecond pulsars, are taken as examples in the experiment and analysis.The results show that the empirical mode decomposition method can be used for whitening the timing noise of the millisecond pulsar.And for millisecond pulsars whose timing residuals are dominated by the timing noise, the timing residual precision is significantly improved after whitening.
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基本信息:
DOI：10.13875/j.issn.1674-0637.2020-04-0310-08
中图分类号:P145.6
引用信息:
[1]李变,屈俐俐,陈永奇.毫秒脉冲星计时噪声处理方法研究[J].时间频率学报,2020,43(04):310-317.DOI:10.13875/j.issn.1674-0637.2020-04-0310-08.
基金信息:
国家自然科学基金资助项目(11473029;11873049;11973046;91736207;42030105)
2020-11-27
2020-11-27
2020-11-27