Left panel: Large-scale dark matter density map from the NEWHORIZON2 simulation surrounding the zoomed-in region. The boundary of the zoomed-in region is indicated by the blue solid line. The selected group halos (M_vir > 10¹² M_⊙) are marked with the red circles. Right panel: Enlarged view of one of the group halos. The different components of the group halo are shown: dark matter in white, gas temperature in red, gas density in blue, and stellar density in green. The gray dashed circle indicates the region within the virial radius.