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

Abstract

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, IllustrisTNG100, and IllustrisTNG300 simulations to compare how different stellar aperture masses trace halo mass. For massive central galaxies ($M_{\star }\ge 10^{11.2}{M}_{\odot }$), we find that a 2D outskirt stellar mass measured between 50 to 100 kpc ($M_{\star ,[50,100]}$) consistently outperforms other aperture-based stellar masses. We further show that $M_{\star ,[50,100]}$ correlates better with halo mass than the total amount of accreted stars (the ex situ mass), which suggests that not all accreted stars connect to halo assembly equally. While the galaxy formation recipes are different between Illustris and IllustrisTNG100, the two simulations yield consistent ex situ outskirt fractions for massive galaxies (about 70% in $M_{\star ,[50,100]}$). These results demonstrate the potential of using the outskirt stellar mass to deepen our understanding of galaxy-halo connection in massive dark matter halos and trace dark matter halos better.

arXiv comment21 pages, 8 figures, accepted for publication in ApJ

References in corpus (117)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• Galactic Stellar and Substellar Initial Mass Function
• E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• The Average Star Formation Histories of Galaxies in Dark Matter Halos from z=0-8
• Simulating Galaxy Formation with the IllustrisTNG Model
• The Aquarius Project: the subhalos of galactic halos
• First results from the IllustrisTNG simulations: matter and galaxy clustering
• First results from the IllustrisTNG simulations: the stellar mass content of groups and clusters of galaxies
• The hierarchical formation of the brightest cluster galaxies
• The epochs of early-type galaxy formation as a function of environment
• Quantifying the bimodal color-magnitude distribution of galaxies
• First results from the IllustrisTNG simulations: the galaxy color bimodality
• Galactic star formation and accretion histories from matching galaxies to dark matter haloes
• Chandra sample of nearby relaxed galaxy clusters: mass, gas fraction, and mass-temperature relation
• Simulating galaxy formation with black hole driven thermal and kinetic feedback
• UniverseMachine: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z=0-10
• The ages and metallicities of galaxies in the local universe
• The Mass Function of an X-Ray Flux-Limited Sample of Galaxy Clusters
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• Chandra Cluster Cosmology Project III: Cosmological Parameter Constraints
• First Results from the TNG50 Simulation: Galactic outflows driven by supernovae and black hole feedback
• Galaxy Groups in the SDSS DR4: I. The Catalogue and Basic Properties
• Minor mergers and the size evolution of elliptical galaxies
• Cluster Abundance Constraints on Quintessence Models
• Tracing cosmic evolution with clusters of galaxies
• The Two Phases of Galaxy Formation
• The Connection between Galaxies and their Dark Matter Halos
• redMaPPer I: Algorithm and SDSS DR8 Catalog
• The merger rate of galaxies in the Illustris Simulation: a comparison with observations and semi-empirical models
• Galaxy Clusters Discovered via the Sunyaev-Zel'dovich Effect in the 2500-square-degree SPT-SZ survey
• Linking halo mass to galaxy luminosity
• New constraints on the evolution of the stellar-to-dark matter connection: a combined analysis of galaxy-galaxy lensing, clustering, and stellar mass functions from z=0.2 to z=1
• The Hyper Suprime-Cam Software Pipeline
• The stellar mass assembly of galaxies in the Illustris simulation: growth by mergers and the spatial distribution of accreted stars
• Cosmological Constraints from the SDSS maxBCG Cluster Catalog
• The Arepo public code release
• EMERGE - An empirical model for the formation of galaxies since $z\sim 10$
• Stellar Population Diagnostics of Elliptical Galaxy Formation
• The Growth and Structure of Dark Matter Haloes
• Galaxy Groups in the SDSS DR4: II. halo occupation statistics
• Stellar mass -- halo mass relation and star formation efficiency in high-mass halos
• The Size Evolution of Star-forming and Quenched Galaxies in the IllustrisTNG simulation
• The Origin of the Brightest Cluster Galaxies
• Magnetohydrodynamics on an unstructured moving grid
• Dark Matter Substructure in Numerical Simulations: A Tale of Discreteness Noise, Runaway Instabilities, and Artificial Disruption
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Cluster Abundances and Weak Lensing
• How do minor mergers promote inside-out growth of ellipticals, transforming the size, density profile and dark matter fraction?
• The Importance of Mergers for the Origin of Intracluster Stars in Cosmological Simulations of Galaxy Clusters
• The star formation main sequence and stellar mass assembly of galaxies in the Illustris simulation
• Galaxy Assembly Bias: A Significant Source of Systematic Error in the Galaxy-Halo Relationship
• The Phoenix Project: the Dark Side of Rich Galaxy Clusters
• The distribution and kinematics of early high-sigma peaks in present-day haloes: implications for rare objects and old stellar populations
• Mapping stellar content to dark matter halos using galaxy clustering and galaxy-galaxy lensing in the SDSS DR7
• Morphology and star formation in IllustrisTNG: the build-up of spheroids and discs
• Strong bimodality in the host halo mass of central galaxies from galaxy-galaxy lensing
• On the formation and physical properties of the Intra-Cluster Light in hierarchical galaxy formation models
• A cluster finding algorithm based on the multiband identification of red sequence galaxies
• CFHTLenS: Co-evolution of galaxies and their dark matter haloes
• Halo Mass and Assembly History Exposed in the Faint Outskirts: the Stellar and Dark Matter Haloes of Illustris Galaxies
• Forming Early-Type Galaxies in LambdaCDM Simulations -I. Assembly histories
• Early type galaxies have been the predominant morphological class for massive galaxies since only z~1
• Hubble Space Telescope Imaging of Brightest Cluster Galaxies
• redMaPPer II: X-ray and SZ Performance Benchmarks for the SDSS Catalog
• The growth of dark matter halos: evidence for significant smooth accretion
• The origin of scatter in the stellar mass - halo mass relation of central galaxies in the EAGLE simulation
• The Atlas3D project - XXIV. The intrinsic shape distribution of early-type galaxies
• Intracluster light: a luminous tracer for dark matter in clusters of galaxies
• Galaxy stellar mass functions of different morphological types in clusters, and their evolution between z=0.8 and z=0
• Parametrizing the Stellar Haloes of Galaxies
• Measuring the escape velocity and mass profiles of galaxy clusters beyond their virial radius
• Individual Stellar Halos of Massive Galaxies Measured to 100 kpc at $0.3<z<0.5$ using Hyper Suprime-Cam
• On the Level of Cluster Assembly Bias in SDSS
• Cosmological Constraints from DES Y1 Cluster Abundances and SPT Multi-wavelength data
• Dark Energy Survey Year 1 results: Detection of Intra-cluster Light at Redshift $\sim$ 0.25
• Revealing the galaxy-halo connection in IllustrisTNG
• Constraints on the mass-richness relation from the abundance and weak lensing of SDSS clusters
• Modeling projection effects in optically-selected cluster catalogues
• The relationship between the morphology and kinematics of galaxies and its dependence on dark matter halo structure in EAGLE
• Galaxy Cluster Mass Estimation from Stacked Spectroscopic Analysis
• Disruption of satellite galaxies in simulated groups and clusters: the roles of accretion time, baryons, and pre-processing
• The information content of stellar halos: Stellar population gradients and accretion histories in early-type Illustris galaxies
• The Correlation Between Halo Mass and Stellar Mass for the Most Massive Galaxies in the Universe
• Localized massive halo properties in Bahamas and Macsis simulations: scalings, log-normality, and covariance
• The origin and properties of massive prolate galaxies in the Illustris simulation
• IllustrisTNG in the HSC-SSP: image data release and the major role of mini mergers as drivers of asymmetry and star formation
• Is diffuse intracluster light a good tracer of the galaxy cluster matter distribution?
• Weak Lensing Reveals a Tight Connection Between Dark Matter Halo Mass and the Distribution of Stellar Mass in Massive Galaxies
• The MASSIVE Survey - X. Misalignment between Kinematic and Photometric Axes and Intrinsic Shapes of Massive Early-Type Galaxies
• Optical selection bias and projection effects in stacked galaxy cluster weak lensing
• Stellar mass as a galaxy cluster mass proxy: application to the Dark Energy Survey redMaPPer clusters
• The growth of brightest cluster galaxies in the TNG300 simulation:dissecting the contributions from mergers and in situ star formation
• Stellar Velocity Dispersion: Linking Quiescent Galaxies to their Dark Matter Halos
• The scaling relation between richness and mass of galaxy clusters: a Bayesian approach
• Mass of the dynamically hot inner stellar halo predicts the ancient accreted stellar mass
• Physical Correlations of the Scatter between Galaxy Mass, Stellar Content, and Halo Mass
• CALIFA reveals Prolate Rotation in Massive Early-type Galaxies: A Polar Galaxy Merger Origin?
• Stellar mass -- halo mass relation for the brightest central galaxies of X-ray clusters since z~0.65
• SDSS-IV MaNGA: The intrinsic shape of slow rotator early-type galaxies
• The Impact of Environment on the Stellar Mass - Halo Mass Relation
• The Contribution of In-situ and Ex-situ Star Formation in Early-Type Galaxies: MaNGA versus IllustrisTNG
• Reaching for the Edge I: Probing the Outskirts of Massive Galaxies with HSC, DECaLS, SDSS, and Dragonfly
• Euclid: Early Release Observations -- The intracluster light and intracluster globular clusters of the Perseus cluster
• The Observed Evolution of the Stellar Mass - Halo Mass Relation for Brightest Central Galaxies
• Characterising the Intracluster Light over the Redshift Range $0.2<z<0.8$ in the DES-ACT Overlap
• Prospects for Recovering Galaxy Intrinsic Shapes from Projected Quantities
• Stellar and Weak Lensing Profiles of Massive Galaxies in the Hyper-Suprime Cam Survey and in Hydrodynamic Simulations
• The Outer Stellar Mass of Massive Galaxies: A Simple Tracer of Halo Mass with Scatter Comparable to Richness and Reduced Projection Effects
• The Dependence of Halo Mass on Galaxy Size at Fixed Stellar Mass Using Weak Lensing
• Assembly of the Intracluster Light in the Horizon-AGN Simulation
• The XXL Survey X: K-band luminosity - weak-lensing mass relation for groups and clusters of galaxies
• The Impact of Environment on Late Time Evolution of the Stellar Mass - Halo Mass Relation
• The intrinsic shape of galaxy bulges
• The dark matter halo masses of elliptical galaxies as a function of observationally robust quantities
• Improving Galaxy Cluster Selection with the Outskirt Stellar Mass of Galaxies

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