论文标题
用峰标量来源增强引力波各向异性
Enhancing gravitational wave anisotropies with peaked scalar sources
论文作者
论文摘要
宇宙起源的引力波（GW）背景预计几乎是各向同性的，而小各向异性类似于宇宙微波背景的各向异性。我们分析了标量引起的GW背景的情况，并在此过程中澄清了两种计算GW各向异性方法之间的关系。我们专注于通过明显峰值标量频谱来源的GW场景，在原始黑洞生产的背景下，经常考虑它们。我们表明，所得的GW各向异性的特征是不同的频率依赖性。我们探讨了集中在太空GW检测器的频带中的GW背景上的观察后果。我们通过不同的空间GW检测器以及GW和CMB实验之间的两种互相关研究信号的可检测性。
Gravitational wave (GW) backgrounds of cosmological origin are expected to be nearly isotropic, with small anisotropies resembling those of the cosmic microwave background. We analyse the case of a scalar-induced GW background and clarify in the process the relation between two different approaches to calculating GW anisotropies. We focus on GW scenarios sourced by a significantly peaked scalar spectrum, which are frequently considered in the context of primordial black holes production. We show that the resulting GW anisotropies are characterised by a distinct frequency dependence. We explore the observational consequences concentrating on a GW background enhanced in the frequency band of space-based GW detectors. We study the detectability of the signal through both cross-correlations among different space-based GW detectors, and among GW and CMB experiments.
