Globular cluster numbers in dark matter haloes in a dual formation scenario: an empirical model within EMERGE

Abstract

We present an empirical model for the number of globular clusters (GCs) in galaxies based on recent data showing a tight relationship between dark matter halo virial masses and GC numbers. While a simple base model forming GCs in low-mass haloes reproduces this relation, we show that a second formation pathway for GCs is needed to account for observed younger GC populations. We confirm previous works that reported the observed linear correlation as being a consequence of hierarchical merging and its insensitivity to the exact GC formation processes at higher virial masses, even for a dual formation scenario. We find that the scatter of the linear relation is strongly correlated with the relative amount of smooth accretion: the more dark matter is smoothly accreted, the fewer GCs a halo has compared to other haloes of the same mass. This scatter is smaller than that introduced by halo mass measurements, indicating that the number of GCs in a galaxy is a good tracer for its dark matter mass. Smooth accretion is also the reason for a lower average dark matter mass per GC in low-mass haloes. Finally, we successfully reproduce the observed general trend of GCs being old and the tendency of more massive haloes hosting older GC systems. Including the second GC formation mechanism through gas-rich mergers leads to a more realistic variety of GC age distributions and also introduces an age inversion in the halo virial mass range $\log M_{\mathrm{vir}}/{\mathrm{M}}_{\odot }=11-13$.

arXiv comment18 pages, 19 figures, accepted for publication in MNRAS

References in corpus (71)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• Planck 2015 results. XIII. Cosmological parameters
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The cosmological simulation code GADGET-2
• Efficient Computation of CMB anisotropies in closed FRW models
• The Rockstar Phase-Space Temporal Halo Finder and the Velocity Offsets of Cluster Cores
• Concentrations of Dark Halos from their Assembly Histories
• Multi-scale initial conditions for cosmological simulations
• Extragalactic Globular Clusters and Galaxy Formation
• Gravitationally Consistent Halo Catalogs and Merger Trees for Precision Cosmology
• The Ages of 55 Globular Clusters as Determined Using an Improved delta V_TO^HB Method Along with Color-Magnitude Diagram Constraints, and Their Implications for Broader Issues
• The Evolution of the Star-forming Interstellar Medium across Cosmic Time
• EMERGE - An empirical model for the formation of galaxies since $z\sim 10$
• Haloes gone MAD: The Halo-Finder Comparison Project
• On the Origin of Globular Cluster Systems in Elliptical and cD Galaxies
• The Formation of Giant Elliptical Galaxies and Their Globular Cluster Systems
• Formation of globular clusters in hierarchical cosmology
• Globular clusters as the relics of regular star formation in 'normal' high-redshift galaxies
• Generating Dark Matter Halo Merger Trees
• A High Stellar Velocity Dispersion and ~100 Globular Clusters for the Ultra Diffuse Galaxy Dragonfly 44
• The E-MOSAICS Project: simulating the formation and co-evolution of galaxies and their star cluster populations
• On the Formation of Globular Cluster Systems in a Hierarchical Universe
• The Bifurcated Age-Metallicity Relation of Milky Way Globular Clusters and its Implications For the Accretion History of the Galaxy
• The Ages and Abundances of the M87 Globular Clusters
• The globular cluster system of NGC 1399 V. dynamics of the cluster system out to 80 kpc
• The SLUGGS Survey: Kinematics for over 2500 Globular Clusters in Twelve Early-type Galaxies
• The formation and hierarchical assembly of globular cluster populations
• Galactic Dark Matter Halos and Globular Cluster Populations. III: Extension to Extreme Environments
• The growth of dark matter halos: evidence for significant smooth accretion
• Extensive Globular Cluster Systems Associated with Ultra Diffuse Galaxies in the Coma Cluster
• The E-MOSAICS project: tracing galaxy formation and assembly with the age-metallicity distribution of globular clusters
• The Globular Cluster System of NGC 5128 II. Ages, Metallicities, Kinematics, and Formation
• Kinematics, ages, and metallicities of star clusters in NGC 1316: A 3 Gyr old merger remnant
• Globular Clusters in 19 Northern Abell Clusters
• Extragalactic Globular Clusters: Old Spectroscopic Ages and New Views on Their Formation
• Extending the Globular Cluster System-Halo Mass Relation to the Lowest Galaxy Masses
• The SLUGGS Survey: Calcium Triplet-based Spectroscopic Metallicities for Over 900 Globular Clusters
• The globular cluster systems of 54 Coma ultra-diffuse galaxies: statistical constraints from HST data
• Modeling the Formation of Globular Cluster Systems in the Virgo Cluster
• Formation of Globular Cluster Systems: From Dwarf Galaxies to Giants
• The Fossil Record of Two-phase Galaxy Assembly: Kinematics and Metallicities in the Nearest S0 Galaxy
• A 2dF spectroscopic study of globular clusters in NGC 5128: Probing the formation history of the nearest giant Elliptical
• Dark Matter Halos in Galaxies and Globular Cluster Populations. II: Metallicity and Morphology
• Dark Matter Halo Growth II: Diffuse Accretion and its Environmental Dependence
• Generating Merger Trees for Dark Matter Haloes: A Comparison of Methods
• High-Precision Dark Halo Virial Masses from Globular Cluster Numbers: Implications for Globular Cluster Formation and Galaxy Assembly
• Formation of Globular Cluster Candidates in Merging Proto-galaxies at High Redshift: A View from the FIRE Cosmological Simulations
• Globular Clusters in Coma Cluster Ultra Diffuse Galaxies (UDGs): Evidence for Two Types of UDG?
• The formation of low metallicity globular clusters in dwarf galaxy mergers
• Exploring the mass assembly of the early-type disc galaxy NGC3115 with MUSE
• The Globular Cluster - Dark Matter Halo Connection
• Globular Cluster Systems in Brightest Cluster Galaxies. III: Beyond Bimodality
• Age Estimates for Globular Clusters in NGC 1399
• Old Globular Clusters Masquerading as Young in NGC 4365?
• Combining Stellar Populations with Orbit-Superposition Dynamical Modelling - the Formation History of the Lenticular Galaxy NGC 3115
• Metallicity gradients in the globular cluster systems of early-type galaxies: In-situ and accreted components?
• EMERGE: Empirical predictions of galaxy merger rates since $z\sim 6$
• The age of the oldest globular clusters
• A robust estimate of the Milky Way mass from rotation curve data
• The number of globular clusters around the iconic UDG DF44 is as expected for dwarf galaxies
• Ages, Metallicities, and [alpha/Fe] ratios of globular clusters in NGC 147, NGC 185, and NGC 205
• An optical/NIR survey of globular clusters in early-type galaxies II. Ages of GC systems and the relation to galaxy morphology
• The SLUGGS Survey: Measuring globular cluster ages using both photometry and spectroscopy
• Globular Cluster Systems in Brightest Cluster Galaxies. II: NGC 6166
• Age Determination of Fifteen Old to Intermediate-Age Small Magellanic Cloud Star Clusters
• The SLUGGS Survey: globular clusters and the dark matter content of early-type galaxies
• Young globular clusters in NGC 1316
• Globular Cluster Systems of Massive Compact Elliptical Galaxies in the Local Universe: Evidence for Relic Red Nuggets?
• The old globular cluster system of NGC 4365: new VLT/FORS2 spectra

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