Linking the Internal Properties of Infant Globular Clusters to their Formation Environments
arXiv:2211.09583 · doi:10.1093/mnras/stac3399
Abstract
We investigate the formation of infant globular cluster (GC) candidates in high-resolution cosmological simulations from the First Billion Years (FiBY) project. By analysing the evolution of the systems in the energy and angular momentum plane, we identify the redshift at which the infant GCs first became gravitationally bound, and we find evidence of radial infall of their gaseous and stellar components. The collapse appears to be driven by internal self-gravity, however, the initial trigger is sourced from the external environment. The phase space behaviour of the infant GCs also allows us to identify some characteristic groupings of objects. Such a classification based on internal properties appears to be reflected in the formation environment: GC candidates that belong to the same class are found in host galaxies of similar morphology, with the majority of the infant GCs located in clumpy, irregular proto-galaxies. Finally, through the inspection of two GC candidates that contain only stars by z = 6, we find that supernova feedback is the main physical mechanism behind their dearth of gas and that the systems subsequently respond with an approximately adiabatic expansion. Such infant GC candidates already resemble the GCs we currently observe in the local Universe.
17 pages, 12 Figures, Accepted by MNRAS
References in corpus (27)
- Theory of Star Formation
- The effect of photo-ionization on the cooling rates of enriched, astrophysical plasmas
- Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters
- Chemical enrichment in cosmological, smoothed particle hydrodynamics simulations
- Formation and Dynamical Evolution of Multiple Stellar Generations in Globular Clusters
- The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. I. Overview of the Project and Detection of Multiple Stellar Populations
- The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. IX. The Atlas of Multiple Stellar Populations
- Chemical enrichment of galaxy clusters from hydrodynamical simulations
- An extremely primitive halo star
- On the frequency, intensity and duration of starburst episodes triggered by galaxy interactions and mergers
- On the self-enrichment scenario of galactic globular clusters: Constraints on the IMF
- Origin of the abundance patterns in Galactic globular clusters: constraints on dynamical and chemical properties of globular clusters
- The First Billion Years Project: The escape fraction of ionizing photons in the epoch of reionization
- Probing the Formation of the First Low-Mass Stars with Stellar Archaeology
- Paving the way for the JWST: witnessing globular cluster formation at z>3
- Angular momentum evolution of galaxies in EAGLE
- The dynamics and outcome of star formation with jets, radiation, winds, and supernovae in concert
- The E-MOSAICS project: tracing galaxy formation and assembly with the age-metallicity distribution of globular clusters
- The origin of the Milky Way globular clusters
- A Common Origin for Globular Clusters and Ultra-faint Dwarfs in Simulations of the First Galaxies
- The impact of stellar feedback on the density and velocity structure of the interstellar medium
- Exploring the physical properties of lensed star-forming clumps at
- Accretion of pristine gas and dilution during the formation of multiple-population globular clusters
- Sizes of Lensed Lower-luminosity z=4-8 Galaxies from the Hubble Frontier Field Program
- Globular Cluster Formation at High Density: A model for Elemental Enrichment with Fast Recycling of Massive-Star Debris
- Where did the globular clusters of the Milky Way form? Insights from the E-MOSAICS simulations
- Little Blue Dots in the Hubble Space Telescope Frontier Fields: Precursors to Globular Clusters?