论文标题
互相关作为原始引力波的诊断工具
Cross-correlations as a Diagnostic Tool for Primordial Gravitational Waves
论文作者
论文摘要
我们通过确定明确的例子来探索和证实，即具有CMB温度波动的互相关随机引力背景各向异性的有效性，以建立给定重力波信号的原始性质。我们考虑了标量调tensor原始非高斯性诱导的引力波各向异性的情况。我们的分析跨越各向异性表现出不同的角度行为，包括四极依赖性。我们计算了非线性参数$ f _ {\ rm nl} $的预期不确定性，这是由于互相关测量结果而获得的，这些测量值是针对多个提出的实验，例如地面的Einstein望远镜，宇宙探索者，以及空间基的大– Bang观察者。作为未来调查计划的基准，我们还计算了对非线性参数的理论，宇宙差异限制的错误。
We explore and corroborate, by working out explicit examples, the effectiveness of cross-correlating stochastic gravitational wave background anisotropies with CMB temperature fluctuations as a way to establish the primordial nature of a given gravitational wave signal. We consider the case of gravitational wave anisotropies induced by scalar-tensor-tensor primordial non-Gaussianity. Our analysis spans anisotropies exhibiting different angular behaviours, including a quadrupolar dependence. We calculate the expected uncertainty on the non-linearity parameter $F_{\rm NL}$ obtained as a result of cross-correlation measurements for several proposed experiments such as the ground-based Einstein Telescope, Cosmic Explorer, and the space-based Big-Bang Observer. As a benchmark for future survey planning, we also calculate the theoretical, cosmic-variance-limited, error on the non-linearity parameter.
