The Physics of Star Cluster Formation and Evolution

Abstract

Star clusters form in dense, hierarchically collapsing gas clouds. Bulk kinetic energy is transformed to turbulence with stars forming from cores fed by filaments. In the most compact regions, stellar feedback is least effective in removing the gas and stars may form very efficiently. These are also the regions where, in high-mass clusters, ejecta from some kind of high-mass stars are effectively captured during the formation phase of some of the low mass stars and effectively channeled into the latter to form multiple populations. Star formation epochs in star clusters are generally set by gas flows that determine the abundance of gas in the cluster. We argue that there is likely only one star formation epoch after which clusters remain essentially clear of gas by cluster winds. Collisional dynamics is important in this phase leading to core collapse, expansion and eventual dispersion of every cluster. We review recent developments in the field with a focus on theoretical work.

53 pages, 7 figures, preprint of a review to appear in Space Science Reviews Topical collection "Star formation". Changes in this version: updated comments line to to acceptance of the paper by the journal

References in corpus (111)

• Binary interaction dominates the evolution of massive stars
• A Spitzer Survey of Young Stellar Clusters within One Kiloparsec of the Sun: Cluster Core Extraction and Basic Structural Analysis
• Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
• Formation and Dynamical Evolution of Multiple Stellar Generations in Globular Clusters
• The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 Msun stellar mass limit
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. I. Overview of the Project and Detection of Multiple Stellar Populations
• Filamentary structure of star-forming complexes
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. IX. The Atlas of Multiple Stellar Populations
• A comprehensive set of simulations studying the influence of gas expulsion on star cluster evolution
• Star formation through gravitational collapse and competitive accretion
• Gas expulsion and the destruction of massive young clusters
• Physical properties of molecular clouds for the entire Milky Way disk
• Spectroscopic and Photometric evidence of two stellar populations in the Galactic Globular Cluster NGC6121 (M4)
• The Burst Mode of Protostellar Accretion
• Molecular Cloud Evolution II. From cloud formation to the early stages of star formation in decaying conditions
• The role of stellar feedback in the formation of galaxies
• The lifecycle of molecular clouds in nearby star-forming disc galaxies
• Star cluster disruption by giant molecular clouds
• What is a globular cluster? An observational perspective
• Evidence for the Strong Effect of Gas Removal on the Internal Dynamics of Young Stellar Clusters
• Fast and inefficient star formation due to short-lived molecular clouds and rapid feedback
• Dynamical mass segregation on a very short timescale
• Inefficient star formation through turbulence, magnetic fields and feedback
• On the self-enrichment scenario of galactic globular clusters: Constraints on the IMF
• Using the minimum spanning tree to trace mass segregation
• From the warm magnetized atomic medium to molecular clouds
• The Birth of Molecular Clouds: Formation of Atomic Precursors in Colliding Flows
• The Global Evolution of Giant Molecular Clouds. I: Model Formulation and Quasi-Equilibrium Behavior
• Cooling, Gravity and Geometry: Flow-driven Massive Core Formation
• The Initial Mass Function of the Massive Star-forming Region NGC 3603 from Near-Infrared Adaptive Optics observations
• The life cycle of star cluster in a tidal field
• The Evolution of Supermassive Population III Stars
• Rapid Molecular Cloud and Star Formation: Mechanisms and Movies
• Light nuclei in galactic globular clusters : constraints on the self-enrichment scenario from nucleosynthesis
• Exploring Anticorrelations and Light Element Variations in Northern Globular Clusters Observed by the APOGEE Survey
• The distinction between star clusters and associations
• Studying the YMC population of M83: how long clusters remain embedded, their interaction with the ISM and implications for GC formation theories
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. II. The seven stellar populations of NGC7089 (M2)
• An Unstable Truth: How Massive Stars get their Mass
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XIX. A Chemical Tagging of the Multiple Stellar Populations Over the Chromosome Maps
• Neon Fine-Structure Line Emission By X-ray Irradiated Protoplanetary Disks
• The secrets of the nearest starburst cluster: II. The present-day mass function in NGC 3603
• Early 56Ni decay γ-rays from SN2014J suggest an unusual explosion
• An upper limit to the energy of gamma-ray bursts indicates that GRB/SNe are powered by magnetars
• The dynamics of collapsing cores and star formation
• Infall-Driven Protostellar Accretion and the Solution to the Luminosity Problem
• The Turbulent Dynamo in Highly Compressible Supersonic Plasmas
• IN-SYNC II: Virial Stars from Sub-Virial Cores -- The Velocity Dispersion of Embedded Pre-Main-Sequence Stars in NGC 1333
• The Arches Cluster Mass Function
• The Interplay between Star Formation and the Nuclear Environment of our Galaxy: Deep X-ray Observations of the Galactic Center Arches and Quintuplet Clusters
• Dependency of dynamical ejections of O stars on the masses of very young star clusters
• Filamentary Accretion Flows in the Infrared Dark Cloud G14.225-0.506 Revealed by ALMA
• Young Stellar Object Variability (YSOVAR): Long Timescale Variations in the Mid-Infrared
• Hierarchical Star-Formation in M33: Fundamental properties of the star-forming regions
• On the mass-radius relation of hot stellar systems
• Impact of Protostellar Outflows on Turbulence and Star Formation Efficiency in Magnetized Dense Cores
• Disruption of giant molecular clouds and formation of bound star clusters under the influence of momentum stellar feedback
• A homogeneous analysis of globular clusters from the APOGEE survey with the BACCHUS code. I. The Northern clusters
• The Search for Multiple Populations in Magellanic Cloud Clusters II: The Detection of Multiple Populations in Three Intermediate-Age SMC Clusters
• Star Formation in Self-Gravitating Turbulent Fluids
• ALMA resolves the spiraling accretion flow in the luminous OB cluster forming region G33.92+0.11
• Multiple populations in the old and massive Small Magellanic Cloud globular cluster NGC121
• High-mass Star Formation through Filamentary Collapse and Clump-fed Accretion in G22
• Nitrogen abundances and multiple stellar populations in the globular clusters of the Fornax dSph
• CNO abundances in the globular clusters NGC 1851 and NGC 6752
• Structure and mass segregation in Galactic stellar clusters
• The Green Bank Ammonia Survey: Dense Cores Under Pressure in Orion A
• Star Formation in Space and Time: The Orion Nebula Cluster
• Helium and Multiple Populations in the Massive Globular Cluster NGC6266 (M62)
• The Impact of Feedback During Massive Star Formation by Core Accretion
• The State-of-the-Art HST Astro-Photometric Analysis of the core of ωCentauri. III. The Main Sequence's Multiple Populations Galore
• Not all stars form in clusters - measuring the kinematics of OB associations with $Gaia$
• Searching for Chemical Signatures of Multiple Stellar Populations in the Old, Massive Open Cluster NGC 6791
• Tracing the Conversion of Gas into Stars in Young Massive Cluster Progenitors
• The Formation of Stellar Clusters in Magnetized, Filamentary Infrared Dark Clouds
• Constraining globular cluster formation through studies of young massive clusters - V. ALMA observations of clusters in the Antennae
• The state of globular clusters at birth II: primordial binaries
• Accretion of pristine gas and dilution during the formation of multiple-population globular clusters
• The search for multiple populations in Magellanic Clouds clusters - V. Correlation between cluster age and abundance spreads
• Time Varying Dynamical Star Formation Rate
• The Search for Multiple Populations in Magellanic Cloud Clusters I: Two Stellar Populations in the Small Magellanic Cloud Globular Cluster NGC 121
• Revisiting nucleosynthesis in globular clusters: the case of NGC 2808 and the role of He and K
• Investigating the diversity of supernovae type Iax: A MUSE and NOT spectroscopic study of their environments
• Bondi-Hoyle-Littleton accretion and the upper mass stellar IMF
• Feedback by massive stars and the emergence of superbubbles II. X-ray properties
• 26Al kinematics: superbubbles following the spiral arms? Constraints from the statistics of star clusters and HI supershells
• The Gaia-ESO Survey: Asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2
• Globular Cluster Formation at High Density: A model for Elemental Enrichment with Fast Recycling of Massive-Star Debris
• The formation of secondary stellar generations in massive young star clusters from rapidly cooling shocked stellar winds
• Multiple stellar populations and their evolution in globular clusters: A nucleosynthesis perspective
• Four stellar populations and extreme helium variation in the massive outer-halo globular cluster NGC 2419
• Synthetic Observations of Magnetic Fields in Protostellar Cores
• The difficult early stages of embedded star clusters and the importance of the pre-gas expulsion virial ratio
• The survival of star clusters with black hole subsystems
• Hubble Space Telescope analysis of stellar populations within the globular cluster G1 (Mayall II) in M31
• Primordial mass segregation in simulations of star formation?
• Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud IV: Evidence for Multiple Populations in Hodge 11 and NGC 2210
• Spectral properties and detectability of supermassive stars in protoglobular clusters at high redshift
• Heart of Darkness: dust obscuration of the central stellar component in globular clusters younger than ~100Myr in multiple stellar population models
• Synthetic ${}^{26}$Al emission from galactic-scale superbubble simulations
• Ambipolar Diffusion in Molecular Cloud Cores and the Gravomagneto Catastrophe
• Hierarchical formation of Westerlund 1: a collapsing cluster with no primordial mass segregation?
• The Accelerating Pace of Star Formation
• Diffuse Thermal X-Ray Emission in the Core of the Young Massive Cluster Westerlund 1
• Non-Equilibrium Ionization Model for Stellar Cluster Winds and its Application
• The Arches cluster revisited. III. An addendum to the stellar census
• On the Onset of Secondary Stellar Generations in Giant Star Forming Regions and Massive Star Clusters
• Rates and delay times of Type Ia supernovae in the helium-enriched main-sequence donor scenario
• Gravitational Focusing and the Star Cluster Initial Mass Function
• The young stellar population in NGC 247 Main properties and hierarchical clustering
• Young Massive Clusters: Their Population Properties, Formation and Evolution, and Their Relation to the Ancient Globular Clusters

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