Precision cosmic expansion in the era of gravitational-wave astronomy

在宇宙膨胀率的大小上，本地星系指标的测量结果与早期宇宙的预测之间存在分歧，这对宇宙学来说是一场危机。本项目旨在利用最近在观测和理论方面的科学突破来解决这一问题。我们将通过对宇宙速度场的精确建模来优化引力波天文学发现的标准警报的膨胀测量，这限制了这一分析。我们将利用数值广义相对论的最新突破来探索时空曲率变化对这些测量的影响。因此，我们将提高我们对描述宇宙及其物理的最重要参数的理解。

The disagreement in the size of the cosmic expansion rate, between measurements from local galaxy indicators and predictions from the early Universe, is a crisis for cosmology. This Project aims to resolve this situation using recent scientific breakthroughs in both observations and theory. We will optimise expansion measurements from the standard sirens discovered by gravitational-wave astronomy by accurate modelling of the cosmic velocity field which limits this analysis. And we will use recent breakthoughs in numerical general relativity to explore the influence of space-time curvature variations on these measurements. We will hence improve our understanding of the most important parameter describing the Universe, and its physics.