The Initial Properties of Young Star Clusters in M83

Abstract

The initial sizes and masses of massive star clusters provide information about the cluster formation process and also determine how cluster populations are modified and destroyed, which have implications for using clusters as tracers of galaxy assembly. Young massive cluster populations are often assumed to be unchanged since cluster formation, and therefore their distribution of masses and radii are used as the initial values. However, the first few hundred million years of cluster evolution does change both cluster mass and cluster radius, through both internal and external processes. In this paper, we use a large suite of $N$-body cluster simulations in an appropriate tidal field to determine the best initial mass and initial size distributions of young clusters in the nearby galaxy M83. We find that the initial masses follow a power-law distribution with a slope of -2.7 $\pm$ 0.4, and the half-mass radii follow a log-normal distribution with a mean of 2.57 $\pm$ 0.04 pc and a dispersion of 1.59 $\pm$ 0.01 pc. The corresponding initial projected half-light radius function has a mean of 2.7 $\pm$ 0.3 pc and a dispersion of 1.7 $\pm$ 0.2 pc. The evolution of the initial mass and size distribution functions are consistent with mass loss and expansion due to stellar evolution, independent of the external tidal field and the cluster's initial density profile. Observed cluster sizes and masses should not be used as the initial values, even when clusters are only a few hundred million years old.

arXiv comment8 pages, 6 figures, accepted for publication in MNRAS

References in corpus (40)

• On the variation of the Initial Mass Function
• Detailed Structural Decomposition of Galaxy Images
• Evolution of binary stars and the effect of tides on binary populations
• Detailed Decomposition of Galaxy Images. II. Beyond Axisymmetric Models
• Comprehensive analytic formulae for stellar evolution as a function of mass and metallicity
• Young massive star clusters
• Star Clusters Across Cosmic Time
• Destruction of the Galactic Globular Cluster System
• Origin of the system of globular clusters in the Milky Way
• The formation and assembly history of the Milky Way revealed by its globular cluster population
• The Evolution of Globular Clusters in the Galaxy
• Star cluster disruption by giant molecular clouds
• The E-MOSAICS Project: simulating the formation and co-evolution of galaxies and their star cluster populations
• Legacy ExtraGalactic UV Survey (LEGUS) with The Hubble Space Telescope. I. Survey Description
• Black holes and core expansion in massive star clusters
• Co-Evolution of Galactic Nuclei and Globular Cluster Systems
• Probing the role of the galactic environment in the formation of stellar clusters; using M83 as a test bench
• Stellar Clusters in M83: Formation, evolution, disruption and the influence of environment
• Building the Galactic halo from globular clusters: evidence from chemically unusual red giants
• Star clusters near and far; tracing star formation across cosmic time
• Enhanced Momentum Feedback from Clustered Supernovae
• Evolution of star clusters in arbitrary tidal fields
• Super star clusters in Haro 11: Properties of a very young starburst and evidence for a near-infrared flux excess
• The GRIFFIN project -- Formation of star clusters with individual massive stars in a simulated dwarf galaxy starburst
• A model for the formation of stellar associations and clusters from giant molecular clouds
• How can young massive clusters reach their present-day sizes?
• Understanding the Dynamical State of Globular Clusters: Core-Collapsed vs Non Core-Collapsed
• The young star cluster population of M51 with LEGUS - II. Testing environmental dependencies
• Sizes and Shapes of Young Star Cluster Light Profiles in M83
• Evidence of a non universal stellar Initial Mass Function. Insights from HST optical imaging of 6 Ultra Faint Dwarf Milky Way Satellites
• A Gentle Introduction to the Kernel Distance
• Age and mass segregation of multiple stellar populations in galactic nuclei and their observational signatures
• The Little Engines That Could? Globular Clusters Contribute Significantly to Reionization-era Star Formation
• A prescription and fast code for the long-term evolution of star clusters
• Molecular gas in the galaxy M83. II - Kinematics of the molecular gas
• Simulating radiative feedback and star cluster formation in GMCs: II. Mass dependence of cloud destruction and cluster properties
• The Effects of Orbital Inclination on the Scale Size and Evolution of Tidally Filling Star Clusters
• Constraints on Upper Cutoffs in the Mass Functions of Young Star Clusters
• A tight relation between the age distributions of stellar clusters and the properties of the interstellar medium in the host galaxy
• On the initial mass-radius relation of stellar clusters

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• Galactic properties that favour star cluster formation: a statistical view