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The initial and present-day mass functions (ICMF and PDMF, respectively) of the Galactic globular clusters (GCs) are constructed based on their observed luminosities, the stellar evolution and dynamical mass-loss processes, and the…

Astrophysics of Galaxies · Physics 2015-06-04 Charles Bonatto , Eduardo Bica

Dwarf galaxies are known to exhibit an unusual richness in numbers of globular clusters (GCs), property quantified by the specific frequency ($S_N$), which is high for dwarf and giant elliptical galaxies, but with a minimum for…

We probe the evolution of globular clusters that could form in giant molecular clouds within high-redshift galaxies. Numerical simulations demonstrate that the large and dense enough gas clouds assemble naturally in current hierarchical…

Astrophysics · Physics 2009-11-13 Oleg Y. Gnedin , Jose L. Prieto

In a series of three papers, we introduced a novel cluster formation model that describes the formation, growth, and disruption of star clusters in high-resolution cosmological simulations. We tested this model on a Milky Way-sized galaxy…

Astrophysics of Galaxies · Physics 2020-03-18 Hui Li , Oleg Gnedin

We study the assembly of globular clusters (GCs) in 9 galaxy clusters using the cosmological simulation Illustris. GCs are tagged to individual galaxies at their infall time. The tidal removal of GCs from their galaxies and the distribution…

Astrophysics of Galaxies · Physics 2020-03-04 Felipe Ramos-Almendares , Laura V. Sales , Mario G. Abadi , Jessica E. Doppel , Hernan Muriel , Eric W. Peng

The initial cluster mass function (ICMF) is a fundamental property of star formation in galaxies. To gauge its universality, we measure and compare the ICMFs in irregular and spiral galaxies. Our sample of irregular galaxies is based on 13…

Astrophysics · Physics 2009-09-29 Jayce D. Dowell , Brent A. Buckalew , Jonathan C. Tan

(Abridged): The total populations of globular cluster systems (GCSs) are discussed in terms of their connection to the efficiency of globular cluster formation---the mass fraction of star-forming gas that was able to form bound stellar…

Astrophysics · Physics 2009-10-31 Dean E. McLaughlin

In this work, we trace the complete life cycle of individual GMCs in high-resolution Milky Way-mass galaxy simulations to determine how different stellar feedback mechanisms and galactic-scale processes govern cloud lifetimes, mass…

Astrophysics of Galaxies · Physics 2025-07-22 Yang Ni , Hui Li , Mark Vogelsberger , Laura V. Sales , Federico Marinacci , Paul Torrey

We investigate the structural, kinematical, and chemical properties of globular cluster systems (GCSs) in galaxies of different Hubble types in a self-consistent manner based on high-resolution cosmological N-body simulations combined with…

Astrophysics · Physics 2009-11-13 K. Bekki , H. Yahagi , M. Nagashima , D. A. Forbes

We present a simple physical model for the minimum mass of bound stellar clusters as a function of the galactic environment. The model evaluates which parts of a hierarchically-clustered star-forming region remain bound given the…

Astrophysics of Galaxies · Physics 2019-07-17 Sebastian Trujillo-Gomez , Marta Reina-Campos , J. M. Diederik Kruijssen

In this paper, we discuss the origin of the observed correlation between cluster concentration c and present-day mass function (PDMF) slope {\alpha} reported by De Marchi, Paresce & Pulone. This relation can either be reproduced from…

Solar and Stellar Astrophysics · Physics 2015-06-17 Nathan W. C. Leigh , Mirek Giersz , Jeremy J. Webb , Arkadiusz Hypki , Guido de Marchi , Pavel Kroupa , Alison Sills

Deep HST/WFPC2 (V,I) photometry is used to investigate the globular cluster system (GCS) in NGC 4874, the central cD galaxy of the Coma cluster. The luminosity function of the clusters displays its normal Gaussian-like shape and turnover…

Astrophysics · Physics 2009-10-31 W. E. Harris , J. J. Kavelaars , D. A. Hanes , J. E. Hesser , C. J. Pritchet

We perform a high resolution zoom-in simulation of star cluster assembly including the merger of two sub-clusters with initial conditions taken from previous large scale giant molecular cloud (GMC) simulations. We couple hydrodynamics to…

Astrophysics of Galaxies · Physics 2025-07-04 Jeremy Karam , Michiko S. Fujii , Alison Sills

We investigate structural properties of old, metal-poor globular clusters (GCs) formed at high redshifts (z>6) and located inside and outside virialized galaxy-scale halos in clusters of galaxies with the total masses of M_CL based on…

Astrophysics · Physics 2009-11-11 Kenji Bekki , Hideki Yahagi

Energetic feedback from star clusters plays a pivotal role in shaping the dynamical evolution of giant molecular clouds (GMCs). To study the effects of stellar feedback on the star formation efficiency of the clouds and the dynamical…

Astrophysics of Galaxies · Physics 2019-05-29 Hui Li , Mark Vogelsberger , Federico Marinacci , Oleg Y. Gnedin

We describe a maximum-likelihood method for determining the mass distribution in spherical stellar systems from the radial velocities of a population of discrete test particles. The method assumes a parametric form for the mass distribution…

Astrophysics · Physics 2009-11-13 Xiaoan Wu , Scott Tremaine

During their evolution, star clusters undergo mass segregation, by which the orbits of the most massive stars shrink, while the lighter stars move outwards from the cluster centre. In this context, recent observations and dynamical…

Astrophysics of Galaxies · Physics 2015-11-04 Manuel Arca-Sedda

Several observational and theoretical indications suggest that the initial mass function (IMF) becomes increasingly top-heavy (i.e., overabundant in high-mass stars with mass $m > 1M_{\odot}$) with decreasing metallicity and increasing gas…

Astrophysics of Galaxies · Physics 2020-12-15 Hosein Haghi , Ghasem Safaei , Akram Hasani Zonoozi , Pavel Kroupa

A comprehensive study of the co-evolution of globular cluster systems (GCS) in galaxies requires the ability to model both the large scale dynamics (0.01 - 10 kpc) regulating their orbital evolution, and the small scale dynamics (sub-pc -…

Astrophysics of Galaxies · Physics 2022-06-29 A. Leveque , M. Giersz , M. Arca-Sedda , A. Askar

We study the evolution of the galactic globular cluster system to determine its initial mass-function and the fraction of halo stars that could have come from disrupted globular clusters. We study the cluster evolution under the influence…

Astrophysics · Physics 2007-05-23 H. Baumgardt