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astro-ph.GA2026
Weak Evolution of Cosmic Atomic Hydrogen over the Past 4.5 Billion Years
Chuan-Peng Zhang, Hong Guo, Yizhou Gu +49
The cosmic star formation rate density (CSFRD) has declined sharply toward the present day, but the roles of the atomic and molecular gas reservoirs remain uncertain. We measure th…
astro-ph.GA2026
The Sinking Statistics of Dark Matter Subhalos Across Hierarchical Levels
Wenkang Jiang, Jiaxin Han, Kun Xu +6
We investigate the mergers among subhalos in a CDM simulation, focusing on two fundamental aspects overlooked by previous studies: 1) how to identify mergers robustly; 2) the st…