Baryonic impacts on dark matter at different scales

Abstract

Contemporarily, dark matter remains a mysterious part of the universe where no exact model has been confirmed experimentally. Nevertheless, various studies have discussed possible impacts on dark matter based on theoretical framework and numerical simulations in recent years. In this study, it aims to find baryonic impacts on dark matter by comparing dark matter distribution in dark matter only simulations and hydrodynamic simulations on different scales (cosmic web and dark matter halos). To be specific, some previous results are compared between several studies analysing baryonic impacts, mainly focusing on the mass fraction and volume fraction of cosmic web, halo shape, halos orbital properties, phase space density, some physical processes related to baryons, etc. Additionally, the state-of-art hydrodynamic simulations and dark matter only simulations are introduced briefly as a basic knowledge. Overall, these results shed light on guiding further exploration of dark matter behaviours on different scales under the impact of baryons.