The Outskirt Stellar Mass of Low-redshift Massive Galaxies Is an Excellent Halo Mass Proxy in Illustris/IllustrisTNG Simulations

Recent observations suggest that the extended stellar halos of low-redshift massive galaxies are tightly connected to the assembly of their dark matter halos. In this paper, we use the Illustris , IllustrisTNG 100, and IllustrisTNG 300 simulations to compare how different stellar aperture masses tra...

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Bibliographic Details

Published in:	The Astrophysical Journal
Main Authors:	Shuo Xu, Song Huang, Alexie Leauthaud, Benedikt Diemer, Katya Leidig, Carlo Cannarozzo, Conghao Zhou
Format:	Article
Language:	English
Published:	IOP Publishing 2025-01-01
Subjects:	Galaxy dark matter halos Galaxy stellar halos Hydrodynamical simulations Galaxy formation Galaxy physics Galaxy structure
Online Access:	https://doi.org/10.3847/1538-4357/adeca0