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arXiv 0909.1054astro-ph.SRastro-ph.IM
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脉冲星自转和轨道周期的稳定性

Stability of pulsar rotational and orbital periods

Sergei Kopeikin

摘要:

毫秒和双星是最稳定的天文频率标准。它们可以应用于解决天文学和计时计量学中的许多问题,包括寻找早期宇宙中的随机引力波背景,测试广义相对论,以及建立新的时间尺度。为了全面研究脉冲星的性质,需要对脉冲星的自旋和轨道参数进行正确的无偏估计。这些估计基本上取决于脉冲星定时残差中存在的随机噪声分量。仪器白噪声具有可预测的统计特性,对定时观测的解释没有损害,而天体物理/地球物理低频噪声则破坏了定时观测,从而降低了广义相对论检验的质量,降低了脉冲星时标的稳定性。

英文摘要:

Millisecond and binary pulsars are the most stable astronomical standards of frequency. They can be applied to solving a number of problems in astronomy and time-keeping metrology including the search for a stochastic gravitational wave background in the early universe, testing general relativity, and establishing a new time-scale. The full exploration of pulsar properties requires that proper unbiased estimates of spin and orbital parameters of the pulsar be obtained. These estimates depend essentially on the random noise components present in pulsar timing residuals. The instrumental white noise has predictable statistical properties and makes no harm for interpretation of timing observations, while the astrophysical/geophysical low-frequency noise corrupts them, thus, reducing the quality of tests of general relativity and decreasing the stability of the pulsar time scale.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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