Multi-wavelength Cluster Cosmology

在这个项目中，我们将探讨标准宇宙学模型面临的两个主要挑战：什么是宇宙后期加速膨胀的原因，以及暗物质的性质是什么。对星系团的X射线观测将是我们活动的核心。在大多数情况下，获得光学/近红外成像调查也是至关重要的。我们已经掌握了一些必要的数据集(这要归功于我们之前在XMM星系团调查(XCS)和暗能量调查(DES)上的工作)。其他项目将在项目期间提供(这要归功于eROSITA全天巡天，eRASS和传统的空间与时间调查，LSST)。该项目将涉及从DES和LSST探测到的星系团中提取宇宙学参数的X射线支持，以及通过ICM和DM对“第五种力量”的不同反应来测试修正的重力模型。

In this project, we will approach two major challenges to the standard cosmological model: what is responsible for the late time acceleration of the expansion of the Universe, and what is the nature of dark matter. X-ray observations of clusters of galaxies will be at the core of our activity. In most cases, access to Optical/near-IR imaging surveys will also be essential. Some of the necessary data sets are already at our disposal (thanks to our previous work on the XMM Cluster Survey, XCS, and the Dark Energy Survey, DES). Others will become available during the duration of the project (thanks to the eROSITA All Sky Survey, eRASS, and the Legacy Survey of Space and Time, LSST). The project will involve X-ray support to the extraction of cosmological parameters from clusters detected by DES and LSST and testing modified gravity models through the differing responses of the ICM and the DM to a ``fifth force''.