功率谱密度不确定性对致密双星引力波参数估计的影响
Quantifying the Effect of Power Spectral Density Uncertainty on Gravitational-Wave Parameter Estimation for Compact Binary Sources
摘要：
为了进行贝叶斯参数估计以推断致密双星聚结（CBC）中引力波的源性质，必须了解探测器的噪声特性。通常假设检测器噪声是平稳的和高斯的，其特征在于以无限精度测量的功率谱密度（PSD）。我们提出了一种新的方法，将功率谱密度估计的不确定性纳入到二进制源参数的贝叶斯推断中，并将其应用于LIGO-Virgo协作报告的前11个CBC检测。我们发现，将PSD的不确定性只会导致在几个百分点的顺序上的二进制参数后验的位置和宽度的变化。我们的结果可以在git上公开下载[1]。
英文摘要：
In order to perform Bayesian parameter estimation to infer the source properties of gravitational waves from compact binary coalescences (CBCs), the noise characteristics of the detector must be understood. It is typically assumed that the detector noise is stationary and Gaussian, characterized by a power spectral density (PSD) that is measured with infinite precision. We present a new method to incorporate the uncertainty in the power spectral density estimation into the Bayesian inference of the binary source parameters and apply it to the first 11 CBC detections reported by the LIGO- Virgo Collaboration. We find that incorporating the PSD uncertainty only leads to variations in the positions and widths of the binary parameter posteriors on the order of a few percent. Our results are publicly available for download on git [1].
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