Fossil stellar streams and their globular cluster populations in the E-MOSAICS simulations

Abstract

Stellar haloes encode a fossil record of a galaxy's accretion history, generally in the form of structures of low surface brightness, such as stellar streams. While their low surface brightness makes it challenging to determine their age, metallicity, kinematics and spatial structure, the infalling galaxies also deposit globular clusters (GCs) in the halo, which are bright and therefore easier to observe and characterise. To understand how GCs associated with stellar streams can be used to estimate the stellar mass and the infall time of their parent galaxy, we examine a subset of 15 simulations of galaxies and their star clusters from the E-MOSAICS project. E-MOSAICS is a suite of hydrodynamical simulations incorporating a sub-grid model for GC formation and evolution. We find that more massive accreted galaxies typically contribute younger and more metal rich GCs. This lower age results from a more extended cluster formation history in more massive galaxies. In addition, at fixed stellar mass, galaxies that are accreted later host younger clusters, because they can continue to form GCs without being subjected to environmental influences for longer. This explains the large range of ages observed for clusters associated with the Sagittarius dwarf galaxy in the halo of the Milky Way compared to clusters which are thought to have formed in satellites accreted early in the Milky Way's formation history. Using the ages of the GCs associated with the Sagittarius dwarf, we estimate a virial radius crossing lookback time (infall time) of $9.3\pm 1.8Gyr$.

arXiv commentAccepted to MNRAS

References in corpus (83)

• The cosmological simulation code GADGET-2
• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Populating a cluster of galaxies - I. Results at z=0
• The Star Formation Efficiency in Nearby Galaxies: Measuring Where Gas Forms Stars Effectively
• The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations
• A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy: I. Morphology of the Sagittarius Core and Tidal Arms
• Substructures in hydrodynamical cluster simulations
• The Field of Streams: Sagittarius and its Siblings
• Extragalactic Globular Clusters and Galaxy Formation
• The Ghost of Sagittarius and Lumps in the Halo of the Milky Way
• Chemical enrichment in cosmological, smoothed particle hydrodynamics simulations
• On the relation between the Schmidt and Kennicutt-Schmidt star formation laws and its implications for numerical simulations
• A giant stream of metal-rich stars in the halo of the galaxy M31
• Simulating galactic outflows with thermal supernova feedback
• The Sagittarius Dwarf Galaxy: a Model for Evolution in a Triaxial Milky Way Halo
• 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 ACS Survey of Galactic Globular Clusters. IX. Horizontal Branch Morphology and the Second Parameter Phenomenon
• The ACS Virgo Cluster Survey IX: The Color Distributions of Globular Cluster Systems in Early-Type Galaxies
• On the fraction of star formation occurring in bound stellar clusters
• Evidence for Stellar Substructure in the Halo and Outer Disk of M31
• Tracing Galaxy Formation with Stellar Halos II: Relating Substructure in Phase- and Abundance-Space to Accretion Histories
• On the Origin of Globular Cluster Systems in Elliptical and cD Galaxies
• Sagittarius: The Nearest Dwarf Galaxy
• The formation and assembly history of the Milky Way revealed by its globular cluster population
• Globular clusters as the relics of regular star formation in 'normal' high-redshift galaxies
• The properties of Galactic globular cluster sub-systems
• The impact of angular momentum on black hole accretion rates in simulations of galaxy formation
• Stellar Streams Discovered in the Dark Energy Survey
• The evolution of substructure III: the outskirts of clusters
• Assessing the Milky Way Satellites Associated with the Sagittarius Dwarf Spheroidal Galaxy
• The E-MOSAICS Project: simulating the formation and co-evolution of galaxies and their star cluster populations
• The second and third parameters of the Horizontal Branch in Globular Clusters
• The Bifurcated Age-Metallicity Relation of Milky Way Globular Clusters and its Implications For the Accretion History of the Galaxy
• The EAGLE simulations of galaxy formation: the importance of the hydrodynamics scheme
• Age Determination of Six Intermediate-age SMC Star Clusters with HST/ACS
• Globular Cluster Systems in Brightest Cluster Galaxies: Bimodal Metallicity Distributions and the Nature of the High-Luminosity Clusters
• On the Star Formation Rate - Brightest Cluster Relation: Estimating the peak SFR in post-merger galaxies
• The Sausage Globular Clusters
• A double main sequence turn-off in the rich star cluster NGC 1846 in the Large Magellanic Cloud
• Globular clusters in the outer Galactic halo: new HST/ACS imaging of 6 globular clusters and the Galactic globular cluster age-metallicity relation
• Ca II Triplet Spectroscopy of Giants in SMC Star Clusters: Abundances, Velocities and the Age-Metallicity Relation
• The Magellanic Stream: Circumnavigating the Galaxy
• Probing the role of the galactic environment in the formation of stellar clusters; using M83 as a test bench
• Building up the globular cluster system of the Milky Way. The contribution of the Sagittarius galaxy
• Globular cluster formation in the context of galaxy formation and evolution
• Evidence for an accretion origin for the outer halo globular cluster system of M31
• Modeling the formation and evolution of star cluster populations in galaxy simulations
• The ghost of a dwarf galaxy: fossils of the hierarchical formation of the nearby spiral galaxy NGC 5907
• Pal 12 As A Part of the Sgr Stream; the Evidence From Abundance Ratios
• Ring structure and warp of NGC5907 -- Interaction with dwarf galaxies
• Re-Assembling the Sagittarius Dwarf Galaxy
• The Dragonfly Nearby Galaxies Survey. I. Substantial variation in the diffuse stellar halos around spiral galaxies
• The three dimensional structure of the giant stellar stream in Andromeda
• The outer halo globular cluster system of M31 - I. The final PAndAS catalogue
• Mapping the Galactic Halo VIII: Quantifying substructure
• The ongoing assembly of a central cluster galaxy: Phase-space substructures in the halo of M87
• The outer halo globular cluster system of M31 - II. Kinematics
• A unified model for the maximum mass-scales of molecular clouds, stellar clusters, and high-redshift clumps
• Panchromatic Hubble Andromeda Treasury XVI. Star Cluster Formation Efficiency and the Clustered Fraction of Young Stars
• The PAndAS Field of Streams: stellar structures in the Milky Way halo toward Andromeda and Triangulum
• Absolute HST Proper Motion (HSTPROMO) of Distant Milky Way Globular Clusters: Galactocentric Space Velocities and the Milky Way Mass
• Multiple populations in the old and massive Small Magellanic Cloud globular cluster NGC121
• Kinematics and Metallicity of M31 Red Giants: The Giant Southern Stream and Discovery of a Second Cold Component at R = 20 kpc
• The binary fractions in the massive young Large Magellanic Cloud star clusters NGC 1805 and NGC 1818
• Physical parameters of 15 intermediate-age LMC clusters from modelling of HST colour-magnitude diagrams
• Predicted Extension of the Sagittarius Stream to the Milky Way Virial Radius
• No evidence of chemical anomalies in the bimodal turnoff cluster NGC 1806 in the LMC
• Photometry of Magellanic Cloud clusters with the Advanced Camera for Surveys - I. The old LMC clusters NGC 1928, 1939 and Reticulum
• The age of the main population of the Sagittarius dwarf spheroidal galaxy. Solving the "M giant conundrum"
• NGC 1866: a milestone for understanding the chemical evolution of stellar populations in the LMC
• The ACS Survey of Galactic Globular Clusters XIV: Bayesian Single-Population Analysis of 69 Globular Clusters
• The origin of the 'blue tilt' of globular cluster populations in the E-MOSAICS simulations
• Dynamical cluster disruption and its implications for multiple population models in the E-MOSAICS simulations
• Young accreted globular clusters in the outer halo of M31
• On the scarcity of Magellanic Cloud-like satellites
• The SLUGGS survey: inferring the formation epochs of metal-poor and metal-rich globular clusters
• On the Iron content of NGC 1978 in the LMC: a metal rich, chemically homogeneous cluster
• Environmental Effects on the Metal Enrichment of Low Mass Galaxies in Nearby Clusters
• Star Formation and Substructure in Galaxy Clusters
• A variation of the fraction of stars that form in bound clusters within M83
• Blood ties: the real nature of the LMC binary globular clusters NGC 2136 and NGC 2137
• Next Generation Virgo Cluster Survey (NGVS). XXXII:~Search for a Globular Cluster Substructure in the Virgo Galaxy Cluster Core
• A sample of relatively unstudied star clusters in the Large Magellanic Cloud: fundamental parameters determined from Washington photometry

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• Kraken reveals itself -- the merger history of the Milky Way reconstructed with the E-MOSAICS simulations
• Reverse engineering the Milky Way
• The E-MOSAICS project: tracing galaxy formation and assembly with the age-metallicity distribution of globular clusters
• Star clusters near and far; tracing star formation across cosmic time
• Formation histories of stars, clusters and globular clusters in the E-MOSAICS simulations
• The galaxy "missing dark matter" NGC1052-DF4 is undergoing tidal disruption
• Introducing EMP-Pathfinder: modelling the simultaneous formation and evolution of stellar clusters in their host galaxies
• The outer halo globular cluster system of M31 - III. Relationship to the stellar halo
• Predicting accreted satellite galaxy masses and accretion redshifts based on globular cluster orbits in the E-MOSAICS simulations
• Young star cluster populations in the E-MOSAICS simulations
• Where did the globular clusters of the Milky Way form? Insights from the E-MOSAICS simulations
• Globular clusters as tracers of the dark matter halo: insights from the E-MOSAICS simulations
• The [α/Fe]-[Fe/H] relation in the E-MOSAICS simulations: its connection to the birth place of globular clusters and the fraction of globular cluster field stars in the bulge
• The mass fraction of halo stars contributed by the disruption of globular clusters in the E-MOSAICS simulations
• NGC 5746: formation history of a massive disc-dominated galaxy
• Linking globular cluster formation at low and high redshift through the age-metallicity relation in E-MOSAICS
• The evolution of the UV luminosity function of globular clusters in the E-MOSAICS simulations
• Discovery of new globular clusters in the Sagittarius dwarf galaxy
• A galaxy's accretion history unveiled from its integrated spectrum
• The survival of globular clusters in a cuspy Fornax
• Physical characterization of recently discovered globular clusters in the Sagittarius dwarf spheroidal galaxy II. Metallicities, ages and luminosities
• The Age-Metallicity-Specific Orbital Energy Relation for the Milky Way's Globular Cluster System Confirms the Importance of Accretion for Its Formation
• Eight more low luminosity globular clusters in the Sagittarius dwarf galaxy
• The physics governing the upper truncation mass of the globular cluster mass function
• What to expect when using globular clusters as tracers of the total mass distribution in Milky Way-mass galaxies
• Metallicities of Outer Halo M31 Globular Clusters from Integrated Light Calcium-II Triplet Spectroscopy
• Globular clusters in the stellar stream surrounding the Milky Way analog NGC 5907
• Where Did the Outskirts Go? Outer Stellar Haloes as a Sensitive Probe of Supernova Feedback
• The formation and disruption of globular cluster populations in simulations of present-day $L^{\ast }$ galaxies with controlled assembly histories
• Mysterious Globular Cluster System of the Peculiar Massive Galaxy M85
• Massive Star Clusters in the Semi-Analytical Galaxy Formation Model L-Galaxies 2020
• Meta-Learning for One-Class Classification with Few Examples using Order-Equivariant Network
• Tidal stripping as a mechanism for placing globular clusters on wide orbits: the case of MGC1 in M31