报告摘要：We are entering a golden age of high-precision cosmology, driven by new-generation large-scale sky surveys (including China's CSST). Galaxy clusters, the universe's largest structures, can be used as powerful "cosmic probes" to illuminate the dominant yet invisible components of the universe: dark matter and dark energy. In this talk, I will present some of our past attempts to find and characterize the galaxy groups/clusters from both large spectroscopic and photometric redshift surveys and their applications in the galaxy formation and cosmological studies. I will also spend some time describing the recent progress of JUST, and its role in the future cluster cosmological probes.

主讲人简介：Xiaohu Yang, is currently a Distinguished Professor at Shanghai Jiao Tong University, Deputy Director of the Tsung-Dao Lee Institute, and Project Lead of the JUST program. He has been supported by the national talent programs including the National Science Fund for Distinguished Young Scholars, the Cheung Kong Scholars Program, and the National High-Level Talents Special Support Program. His research interests mainly focus on the large scale structure of the universe and galaxy formation. Within this framework, he has established the the conditional luminosity function model for galaxy formations, developed the halo-based group finder to map the cosmic web using galaxies, and initiated the ELUCID project with colleagues to reveal the evolution histories of our local universe.