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Galaxies form within the cosmic web dominated by dark matter. Investigating and establishing the connection between galaxies and dark matter is crucial for research in cosmology, large-scale structure, and galaxy formation. In this talk, I will present our recent studies in this area. On large scales, we have developed a set of methods that can reconstruct the initial conditions of the dark matter distribution in the real Universe from galaxy redshift survey, and then use cosmological simulations to obtain the evolutionary history of cosmic structures. Based on these reconstructions, we have investigated a range of astrophysical problems, including detecting the weak signals of the intergalactic medium and constraining active galactic nucleus (AGN) feedback, as well as simulating the formation history of the Coma galaxy cluster and constraining baryonic physical processes, among others. On small scales, I will also introduce our work on the galaxy–halo connection, including the diversity of the stellar mass–halo mass relation and probing the links between the secondary properties of galaxies and halos. These studies can provide insights in understanding the complex physical processes in galaxy formation and the properties of dark matter, and can also contribute to improving reconstruction accuracy.

BIO

Huiyuan Wang is a professor at department of astronomy, University of Science and Technology of China. He obtained his PhD degree in astronomy from USTC in 2006. He joined USTC as a faculty member in 2009 and became a professor in 2016. His research interests include developing methods for constrained cosmological simulation, and using both observational data and simulations to study large-scale structures, galaxy formation and evolution, AGN feedback and the coevolution of supermassive black holes, galaxies and dark halos.

Host: Song Huang