Supporting Cluster Cosmology from Dark Energy Survey and the Large Synoptic Survey Telescope

从暗能量巡天和大型综合巡天望远镜支持星团宇宙学

• 批准号: 2215378
• 金额: --
• 依托单位: University of Sussex
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2215378
• 关键词: Supporting; Cluster; Cosmology; Dark; Energy

Significant international investment over the last decade has resulted in new cluster surveys that can deliver precise measurements of key cosmological parameters. However, are those measurements accurate? Recent results from clusters detected by the Dark Energy Survey (DES) are in significant tension with those from other cosmological probes. This tension is most likely due to hitherto uncorrected systematic effects in the analysis. In this thesis project, we will address the question of whether clusters can be trusted as credible probes of the late time acceleration of the Universe. The project will focus on the analysis of X-ray observations from the XMM-Newton and eROSITA space telescopes and optical/near-IR observations from the Dark Energy Survey and the Large Synoptic Survey Telescope. Specific goals include the quantification of the evolution in the intrinsic scatter between galaxy-richness and halo-mass.

在过去十年中，大量的国际投资导致了新的星系团调查，可以提供关键宇宙学参数的精确测量。然而，这些测量准确吗？暗能量巡天（DES）探测到的星系团的最新结果与其他宇宙学探测器的结果存在显著的矛盾。这种紧张关系很可能是由于分析中迄今未纠正的系统性影响。在这个论文项目中，我们将解决的问题是，集群是否可以被信任为宇宙后期加速的可靠探针。该项目将侧重于分析XMM-牛顿和eROSITA空间望远镜的X射线观测以及暗能量巡天和大型天气巡天望远镜的光学/近红外观测。具体的目标包括量化的演化星系丰富度和晕质量之间的内在散射。