Detection of gravitational waves by pulsar timing
Detection of gravitational waves by pulsar timing
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DOI：
10.1063/1.3455546
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
A. Rodin
中科院分区：
文献类型：
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作者：
A. Rodin
提出了一种解决引力波探测问题的新方法，该方法基于多个脉冲星的同时计时以及随后将拟合后计时数据扩展到不同光谱类型（具有不同光谱指数）的分量。使用脉冲星计时阵列中提出的两点角相关函数来测试频谱分量中随机引力波引起的信号的存在。这种新方法应用于几毫秒脉冲星的计时数据，并允许在相对较高的置信水平下检测到与引力波背景预测相似的特征：实验和理论两点相关性之间的相关系数 ρ = 0.82±0.07。
A new approach to the problem of gravitational waves detection based on simultaneous timing of several pulsars and subsequent expansion of the post‐fit timing data into components of different spectral kind (with different spectral indices) is proposed. Presence of a signal caused by stochastic gravitational waves in spectral components is tested with the two‐point angular correlation function as proposed in the pulsar timing array. This new approach was applied to timing data of a few millisecond pulsars and allowed to detect a signature similar to one predicted for gravitational wave background at relatively high confidence level: correlation coefficient between experimental and theoretical two‐point correlations ρ = 0.82±0.07.