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astro-ph.CO2026
The Environmental Dependence of Halo Intrinsic Alignments: Stronger Signals in Underdense Regions
Masaya Ichikawa, Jingjing Shi, Toshiki Kurita +3
The intrinsic alignment (IA) of galaxies and the dark matter haloes that host them is one of the leading astrophysical systematics for weak-lensing cosmology, yet how the IA signal…
astro-ph.CO2026
Large-scale halo velocity correlations and the impact of finite simulation volumes
Yao-Tsung Chuang, Teppei Okumura, Takahiro Nishimichi
The velocity correlation functions directly measured from the peculiar velocity field of dark matter in numerical simulations are known to have an amplitude lower than that predict…