Title: Alternative Dark Matter Model: One Way to Solve Small Scale Problems
Abstract: Cold Dark Matter (CDM) has achieved great success in explaining the large-scale structure of our universe. However, small-scale observations show inconsistencies with CDM predictions, including the diversity of rotation curves, the existence of extreme galaxies, and satellite galaxy problems. While researchers attempt to solve these problems within the LCDM framework, another possible approach is to modify the CDM paradigm and adopt alternative dark matter models. In this talk, I will briefly describe the small-scale tensions mentioned above and introduce three alternative models: Self-Interacting Dark Matter (SIDM), Warm Dark Matter (WDM), and Fuzzy Dark Matter (FDM). I will explain how they address these small-scale tensions (at least one of them) and outline the unique features of each model, with a focus on SIDM. I will also discuss potential ways to constrain these alternative models.
