The Broken Similarity: Sinking and Merging of Dark Matter Subhalos Across Hierarchical Levels

Wenkang Jiang, Jiaxin Han, Kun Xu +6

We investigate hierarchical mergers among subhalos within a $\hat{I}›$CDM simulation using the HBT+ subhalo finder. Unlike previous methods, HBT+ tracks subhalo evolution across hierarch…