论文标题
在二进制黑洞合并的分布中寻找各向异性
Searching for anisotropy in the distribution of binary black hole mergers
论文作者
论文摘要
宇宙学的标准模型由宇宙统计各向同性的假设为基础。宇宙微波背景，星系分布和超新星的观察，以及其他介质，支持在尺度上$ \ gtrsim 100 $ \，MPC的同型假设。最近发现重力波的恒星质量二元黑洞的发现提供了各向异性的新探针。互补的，独立于宇宙中物质分布的所有其他探针。我们提出了使用球形谐波模型的分析，以确定第一个Ligo/处女座瞬态目录中各向异性的水平。我们发现，第一个瞬态目录中的十个二进制黑洞合并与各向同性分布一致。我们进行了一项模拟事件的研究，以评估未来各向异性探针的前景。在操作的一年内，第三代重力波观测站将以$ \ sim36^\ circ $的角度探测各向异性，$ \ sim36^\ circ $的水平$ \ lyssim0.1 \％$。
The standard model of cosmology is underpinned by the assumption of the statistical isotropy of the Universe. Observations of the cosmic microwave background, galaxy distributions, and supernovae, among other media, support the assumption of isotropy at scales $\gtrsim 100$\,Mpc. The recent detections of gravitational waves from merging stellar-mass binary black holes provide a new probe of anisotropy; complementary and independent of all other probes of the matter distribution in the Universe. We present an analysis using a spherical harmonic model to determine the level of anisotropy in the first LIGO/Virgo transient catalog. We find that the ten binary black hole mergers within the first transient catalog are consistent with an isotropic distribution. We carry out a study of simulated events to assess the prospects for future probes of anisotropy. Within a single year of operation, third-generation gravitational-wave observatories will probe anisotropies with an angular scale of $\sim36^\circ$ at the level of $\lesssim0.1\%$.
