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In previous papers of this series, we developed a new algorithm for modeling the formation of star clusters in galaxy formation simulations. Here we investigate how dissolution of bound star clusters affects the shape of the cluster mass…

Astrophysics of Galaxies · Physics 2019-05-21 Hui Li , Oleg Y. Gnedin

Several recent studies have shown that the star cluster initial mass function (CIMF) can be well approximated by a power law, with indications for a steepening or truncation at high masses. This contribution considers the evolution of such…

Astrophysics of Galaxies · Physics 2015-05-13 M. Gieles

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

Hubble Space Telescope ACS/WFC data in (B,I) are used to investigate the globular cluster populations around 6 gE galaxies ~40 Mpc distant. The total comprises a sample of ~8000 high-probability globular clusters. PSF-convolved King-model…

Cosmology and Nongalactic Astrophysics · Physics 2009-06-25 William E. Harris

We measure how the slope $\alpha$ of the stellar mass function (MF) changes as a function of clustercentric distance $r$ in five Galactic globular clusters and compare $\alpha(r)$ to predictions from direct $N$-body star cluster…

Comparing N-body calculations that include primordial residual-gas expulsion with the observed properties of 20 Galactic globular clusters (GCs) for which the stellar mass function (MF) has been measured, we constrain the time-scale over…

Astrophysics of Galaxies · Physics 2015-05-18 Michael Marks , Pavel Kroupa

We consider tidal masses and ages of Milky Way open clusters, as well as a simple model of their distribution. Our aim is to investigate the space of model parameters and the correspondence between modelled and observed two-dimensional…

Astrophysics of Galaxies · Physics 2025-05-21 Jonathan H. Klos , Andreas Just , Evgeny V. Polyachenko , Peter Berczik , Marina Ishchenko

Galaxy clusters are luminous tracers of the most massive dark matter haloes in the Universe. To use them as a cosmological probe, a detailed description of the properties of dark matter haloes is required. We characterize how the dynamical…

Cosmology and Nongalactic Astrophysics · Physics 2021-09-01 R. Seppi , J. Comparat , K. Nandra , E. Bulbul , F. Prada , A. Klypin , A. Merloni , P. Predehl , J. Ider Chitham

The observed dynamical mass-to-light (M/L) ratios of globular clusters (GCs) are systematically lower than those expected from `canonical' simple stellar population models, which do not account for the preferential loss of low-mass stars…

Astrophysics of Galaxies · Physics 2015-05-13 J. M. Diederik Kruijssen , Steffen Mieske

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

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

A number of recent observational studies of Galactic globular clusters have measured the variation in the slope of a cluster's stellar mass function $\alpha$ with clustercentric distance $r$. In order to gather a deeper understanding of the…

Astrophysics of Galaxies · Physics 2016-09-07 Jeremy J. Webb , Enrico Vesperini

Several models have been advanced to explain the multiple stellar populations observed in globular clusters (GCs). Most models necessitate a large initial population of unenriched stars that provide the pollution for an enriched population,…

Astrophysics of Galaxies · Physics 2018-09-12 Marta Reina-Campos , J. M. Diederik Kruijssen , Joel L. Pfeffer , Nate Bastian , Robert A. Crain

We present the galaxy stellar mass function (MF) and its evolution in clusters from z~0.8 to the current epoch, based on the WIde-field Nearby Galaxy-cluster Survey (WINGS) (0.04<z<0.07), and the ESO Distant Cluster Survey (EDisCS) (0.4<z…

Several observational and theoretical studies suggest that the initial mass function (IMF) slope for massive stars in globular clusters (GCs) depends on the initial cloud density and metallicity, such that the IMF becomes increasingly…

Astrophysics of Galaxies · Physics 2020-12-18 Hosein Haghi , Ghasem Safaei , Akram Hasani Zonoozi , Pavel Kroupa

Globular clusters are unique tracers of ancient star formation. We determine the formation efficiencies of globular clusters across cosmic time by modeling the formation and dynamical evolution of the globular cluster population of a Milky…

Astrophysics of Galaxies · Physics 2015-06-22 Harley Katz , Massimo Ricotti

We have used extensive V, I photometry (down to V=20.9) of 33615 stars in the direction of the globular cluster M55 to study the dynamical interaction of this cluster with the tidal fields of the Galaxy. An entire quadrant of the cluster…

Astrophysics · Physics 2009-09-25 S. Zaggia , G. Piotto , M. Capaccioli

We investigate the clustering and dark matter halo mass for a sample of $\sim$16,000 central galaxies selected from the SDSS/DR7 group catalog. We select subsamples of central galaxies on three two-dimensional planes, each formed by stellar…

Astrophysics of Galaxies · Physics 2016-03-16 Lixin Wang , Cheng Li , Y. P. Jing

Young stellar clusters across nearly five orders of magnitude in mass appear to follow a power-law mass-radius relationship (MRR), $R_{\star} \propto M_{\star}^{\alpha}$, with $\alpha \approx 0.2 - 0.33$. We develop a simple analytic model…

Astrophysics of Galaxies · Physics 2021-10-04 Nick Choksi , J. M. Diederik Kruijssen

Aims. We analyse the effects of a first generation of fast rotating massive stars on the dynamical and chemical properties of globular clusters. Methods. We use stellar models of fast rotating massive stars, losing mass through a slow…

Astrophysics · Physics 2009-11-13 T. Decressin , C. Charbonnel , G. Meynet