How Do the Velocity Anisotropies of Halo Stars, Dark Matter, and Satellite Galaxies Depend on Host Halo Properties?

We investigate the mass ( M _200 ) and concentration ( c _200 ) dependencies of the velocity anisotropy ( β ) profiles for different components in the dark matter halo—including halo stars, dark matter, and subhalos—using systems from the IllustrisTNG simulations. Beyond a critical radius, β becomes...

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Bibliographic Details

Published in:	The Astrophysical Journal
Main Authors:	Jiaxin He, Wenting Wang, Zhaozhou Li, Jiaxin Han, Vicente Rodriguez-Gomez, Donghai Zhao, Xianguang Meng, Yipeng Jing, Shi Shao, Rui Shi, Zhenlin Tan
Format:	Article
Language:	English
Published:	IOP Publishing 2024-01-01
Subjects:	Galaxy dark matter halos Galaxy stellar halos Milky Way stellar halo Hydrodynamical simulations N-body simulations
Online Access:	https://doi.org/10.3847/1538-4357/ad8882