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The current properties of globular cluster systems (GCSs) are the result of the evolution experienced by their host galaxies, which shape the richness of the GCS as well as its spatial distribution, among other features. We carry out an…

Astrophysics of Galaxies · Physics 2022-02-17 Bruno J. De Bortoli , Juan P. Caso , Ana I. Ennis , Lilia P. Bassino

We present new (B,I) photometry for the globular cluster systems in eight Brightest Cluster Galaxies (BCGs), obtained with the ACS/WFC camera on the Hubble Space Telescope. In the very rich cluster systems that reside within these giant…

Astrophysics · Physics 2009-11-13 W. E. Harris , B. C. Whitmore , D. Karakla , W. Okon , W. A. Baum , D. A. Hanes , J. J. Kavelaars

The formation and growth of globular cluster systems (GCSs) is closely related to the evolutionary processes experienced by their host galaxies. In particular, their radial distributions scale with several properties of the galaxies and…

Astrophysics of Galaxies · Physics 2019-08-07 Juan Pablo Caso , Bruno J. De Bórtoli , Ana I. Ennis , Lilia P. Bassino

Globular star clusters are extremely important astrophysical objects since (1) they are prime laboratories for testing stellar evolution; (2) they are ``fossils'' from the epoch of galaxy formation, and thus important cosmological tools;…

Astrophysics · Physics 2007-05-23 Francesco R. Ferraro

We present an end-to-end description of the formation process of globular clusters (GCs) which combines a treatment for their formation and dynamical evolution within galaxy haloes with a state-of-the-art semi-analytic simulation of galaxy…

Observations of Young Star Cluster ({\bf YSC}) systems in interacting galaxies are reviewed with particular emphasis on their Luminosity Functions ({\bf LF}) and colour distributions. A few spectroscopic abundance measurements are…

Astrophysics · Physics 2007-05-23 Uta Fritze-v. Alvensleben

Globular clusters are compact, gravitationally bound systems of up to a million stars. The GCs in the Milky Way contain some of the oldest stars known, and provide important clues to the early formation and continuing evolution of our…

Astrophysics of Galaxies · Physics 2020-07-22 Michael A. Beasley

This review focuses on how galaxies and their globular cluster systems form. I first discuss the now fairly convincing evidence that some globular clusters form in galaxy starbursts/mergers. One way these observations are valuable is they…

Astrophysics · Physics 2007-05-23 Stephen E. Zepf

The ensemble of all star clusters in a galaxy constitutes its star cluster system. In this review, the focus of the discussion is on the ability of star clusters, particularly the systems of old massive globular clusters (GCSs), to mark the…

Astrophysics of Galaxies · Physics 2015-05-14 William E. Harris

We present an overview of observational progress in the study of extragalactic globular cluster systems. Globular clusters turn out to be excellent tracers not only for the star-formation histories in galaxies, but also for kinematics at…

Astrophysics · Physics 2007-05-23 Markus Kissler-Patig

We apply the semi-analytical galaxy formation code of Cole et al. to investigate the formation of globular cluster (GC) systems in hierarchical clustering scenarios. The nature of the model allows us to investigate the properties of GC…

Young, massive star clusters are the most notable and significant end products of violent star-forming episodes triggered by galaxy collisions, mergers, and close encounters. Their contribution to the total luminosity induced by such…

Astrophysics · Physics 2009-11-10 Richard de Grijs

Globular clusters (GCs) are sensitive tracers of galaxy assembly histories but interpreting the information they encode is challenging because mergers are thought to promote both the formation and disruption of GCs. We use simulations with…

The currently available empirical evidence on the star formation processes in the extreme, high-pressure environments induced by galaxy encounters, mostly based on high-resolution Hubble Space Telescope imaging observations, strongly…

Astrophysics · Physics 2007-05-23 Richard de Grijs

A major paradigm shift has recently revolutionized our picture of globular clusters (GC) that were long thought to be simple systems of coeval stars born out of homogeneous material. Indeed, detailed abundance studies of GC long-lived…

Astrophysics of Galaxies · Physics 2013-01-23 C. Charbonnel , M. Krause , T. Decressin , N. Prantzos , G. Meynet

Globular clusters are gravitationally bound stellar systems containing on the order of 100,000 stars. Due to the high stellar densities in the cores of these clusters, close encounters and even physical collisions between stars are…

Astrophysics · Physics 2007-05-23 Christian Knigge

Early-type dwarfs (dEs) are by far the most abundant galaxy population in nearby clusters. Whether these objects are primordial, or the recent end-products of the different physical mechanisms that can transform galaxies once they enter…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 R. Sánchez-Janssen , J. A. L. Aguerri

Stars in globular clusters (GCs) exhibit a peculiar chemical pattern with strong abundance variations in light elements along with a constant abundance in heavy elements. These abundance anomalies can be explained by a primordial pollution…

Astrophysics · Physics 2009-11-13 T. Decressin , H. Baumgardt , P. Kroupa

I will show that photometry -- if extending over a reasonable choice of passbands -- can give fairly precise information about young star clusters and their evolutionary state. Optical colors alone are known to leave severe ambiguities due…

Astrophysics · Physics 2007-05-23 U. Fritze-v. Alvensleben

Based on the earlier work of Gunn and McCrea we model the formation of globular clusters in merging galaxies. Neutral hydrogen observations of dwarf irregular galaxies as well as more luminous systems are used to provide the key parameters…

Astrophysics · Physics 2011-02-11 F. D. A. Hartwick