Precision cosmic expansion in the era of gravitational-wave astronomy

引力波天文学时代的精确宇宙膨胀

• 批准号: DP220101610
• 负责人: Prof Christopher Blake
• 金额: $ 32.37万
• 依托单位: Swinburne University of Technology
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2022
• 资助国家: 澳大利亚
• 起止时间: 2022-01-01 至 2024-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP220101610
• 关键词: Precision; cosmic; expansion; era; gravitational

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.

在宇宙膨胀率的大小上的分歧，在局部星系指标的测量和早期宇宙的预测之间，是宇宙学的危机。 该项目旨在利用观测和理论方面的最新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塞壬的膨胀测量，这限制了这种分析。 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。