Cluster cosmology has entered into a new and exciting era allowing us to probe the universe at an unprecedented scale, thanks to the deployment of large-sky surveys in multiple wavelengths and the recent achievements in characterizing cluster populations using large samples. In this talk, I will first provide an overview of cluster cosmology and highlight the current state-of-the-art constraints based on galaxy clusters. As the key to the success of cluster cosmology, I will then present the recent results of observable-to-mass relations with the mass calibration using weak gravitational lensing. Next, I will talk about the Hyper Suprime-Cam (HSC) survey, the most powerful lensing survey to date, and the eROSITA all-sky survey, the ultimate X-ray survey for cluster cosmology. In particular, I will show the latest results of cluster cosmology in a synergy between HSC and eROSITA, paving a way forward for the joint cosmological study based on large lensing and X-ray surveys. Finally, I will give a prospect of cluster cosmology.
BIO
I-Non Chiu（邱奕儂）is a cosmologist with a focus on studying the universe using galaxy clusters, the largest cosmic systems. He is currently an independent postdoctoral fellow at Tsung-Dao Lee Institute (TDLI), Shanghai. Before that, he was a postdoc at Academia Sinica Institute of Astronomy and Astrophysics (ASIAA) during a period between 2016 and 2020. Before that, he obtained his Ph.D. at Ludwig-Maximilians University, Munich, Germany in 2016.
Host: Dandan Xu
