Title: The Small-Scale Puzzles of ΛCDM and Structural Diversity of Dwarf Galaxies 

Speaker: Professor Fangzhou Jiang  (Peking University)

Time: 14:00pm, January 10, 2025

Location: 5-516, PMO Xianlin Campus

Abstract: The ΛCDM paradigm of structure formation is successful on cosmological large scales but confronts challenges on sub-galactic small scales, regarding the number count, the internal structure, and the spatial distributions of dwarf galaxies and satellite galaxies. In this talk, I present semi-analytical and numerical efforts in quantifying these small-scale puzzles, within the concordance cosmology and in an alternative cosmology consisting of self-interacting dark matter. I discuss frontier trial solutions in the baryonic sector and in the dark sector and compare their pros and cons.