论文标题
混乱噪声对下一代陆生观测值中金色二进制中子事件的影响
The impact of confusion noise on golden binary neutron-star events in next-generation terrestrial observatories
论文作者
论文摘要
下一代地面引力波观测值将检测到每年紧凑型二进制二线的信号。这些信号可以在检测器的灵敏度频段中持续几个小时，它们将受到多个未解决的来源的影响，导致数据中的混乱噪声背景。使用信息矩阵形式主义，我们估计了混淆噪声功率频谱密度在扩大类似GW170817的参数估计中的影响。如果我们对混淆噪声功率频谱密度的估计是忽略的，我们会发现在现实情况下，大约一半的模拟中，质量，旋转和距离会偏向。天空本地化虽然仍然很精确，但我们的模拟中最多可能会偏向$ 80 \％$，这可能会在对电磁对应物的后续搜索中构成问题。
Next-generation terrestrial gravitational-wave observatories will detect $\mathcal{O}(10^{5})$ signals from compact binary coalescences every year. These signals can last for several hours in the detectors' sensitivity band and they will be affected by multiple unresolved sources contributing to a confusion-noise background in the data. Using an information-matrix formalism, we estimate the impact of the confusion noise power spectral density in broadening the parameter estimates of a GW170817-like event. If our estimate of the confusion noise power spectral density is neglected, we find that masses, spins, and distance are biased in about half of our simulations under realistic circumstances. The sky localization, while still precise, can be biased in up to $80\%$ of our simulations, potentially posing a problem in follow-up searches for electromagnetic counterparts.
