演講資訊

摘要：

In this talk, I will first give an introduction to observational cosmology with a focus on utilizing galaxy clusters as a cosmological probe. Then, I will present the recent results of cosmological constraints using the cluster abundance of a sample of eROSITA clusters, which were identified in the eROSITA Final Equatorial Depth Survey (eFEDS). In a joint selection on X-ray and optical observables, the sample contains 455 clusters within a redshift range of 0.1 < z < 1.2, of which 177 systems are covered by the public data from the Hyper Suprime-Cam (HSC) survey that enables a uniform weak-lensing mass calibration. As a result, we deliver cosmological constraints that are in excellent agreement (at a level of < 1 sigma) with the results from other independent methods. In the end, I will dive into my recent progress on the cosmological application of weak-lensing shear-selected galaxy clusters.