论文标题
带有引力波观测的各向同性测量值
An Isotropy Measurement with Gravitational Wave Observations
论文作者
论文摘要
我们使用Ligo-Virgo-Kagra Collaborations（LVK）第三次观察跑步的GWTC-3目录来约束在天体中合并紧凑型二进制文件的分布。通过从O3进行63个自信检测，我们限制了天空速率密度的相对可变性（标准偏差）为$ \ sillesim 16 \％$在90 \％置信度下，假设速率密度的对数通过具有相关长度$ \ geq 10^\ cound^\ cound $ \ egussian随机场描述。当相关长度为$ \ geq 20^\ circ $时，这将收紧到$ \ lyssim 3.5 \％$。虽然新的O3数据为到期的各向异性提供了最严格的限制，但我们也没有发现支持各向同性的压倒性证据。一个简单的计数实验借鉴了$ \ mathcal {b}^\ mathrm {iso} _ \ mathrm {ani} = 3.7 $的一倍，这是仅基于第一次和第二个插入lvk的第一个和第二个插图。
We constrain the distribution of merging compact binaries across the celestial sphere using the GWTC-3 catalog from the LIGO-Virgo-KAGRA Collaborations' (LVK) third observing run. With 63 confident detections from O3, we constrain the relative variability (standard deviation) of the rate density across the sky to be $\lesssim 16\%$ at 90\% confidence assuming the logarithm of the rate density is described by a Gaussian random field with correlation length $\geq 10^\circ$. This tightens to $\lesssim 3.5\%$ when the correlation length is $\geq 20^\circ$. While the new O3 data provides the tightest constraints on anisotropies available to-date, we do not find overwhelming evidence in favor of isotropy, either. A simple counting experiment favors an isotropic distribution by a factor of $\mathcal{B}^\mathrm{iso}_\mathrm{ani} = 3.7$, which is nonetheless an improvement of more than a factor of two compared to analogous analyses based on only the first and second observing runs of the LVK.
