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We propose an evolutionary model to describe the dynamical evolution of star cluster systems in tidal fields, in which we calibrated the parametric equations defining the model by running direct N-body simulations of star clusters with a…

Astrophysics of Galaxies · Physics 2015-06-23 L. J. Rossi , J. R. Hurley

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

It has recently been established that the properties of young star clusters (YSCs) can vary as a function of the galactic environment in which they are found. We use the cluster catalogue produced by the Legacy Extragalactic UV Survey…

We present a comprehensive multi-wavelength study of the star-forming region NGC 1893 to explore the effects of massive stars on low-mass star formation. Using near-infrared colours, slitless spectroscopy and narrow-band $H\alpha$…

Astrophysics · Physics 2009-11-13 Saurabh Sharma , A. K. Pandey , D. K. Ojha , W. P. Chen , S. K. Ghosh , B. C. Bhatt , Maheswar , G. , Ram Sagar

Over the past years observations of young and populous star clusters have shown that the stellar initial mass function (IMF) can be conveniently described by a two-part power-law with an exponent alpha_2 = 2.3 for stars more massive than…

Astrophysics of Galaxies · Physics 2010-11-10 Carsten Weidner , Jan Pflamm-Altenburg , Pavel Kroupa

We use near-infrared observations obtained as part of the {\sl Visible and Infrared Survey Telescope for Astronomy} (VISTA) Survey of the Magellanic Clouds (VMC), as well as two complementary {\sl Hubble Space Telescope} ({\sl HST}) data…

We review many of the basic properties of star cluster systems, and focus in particular on how they relate to their host galaxy properties and ambient environment. The cluster mass and luminosity functions are well approximated by…

Astrophysics of Galaxies · Physics 2015-11-30 Angela Adamo , Nate Bastian

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

We determine the mass function of young star clusters in the merging galaxies the ``Antennae'' (NGC 4038/39) from deep images taken with the WFPC2 on the refurbished Hubble Space Telescope (HST). This is accomplished by means of…

Astrophysics · Physics 2011-03-28 Qing Zhang , S. Michael Fall

In this paper, using 2MASS photometry, we study the mass functions $\phi(M) = dN/dM \propto M^{-\alpha}$ of a sample of nine clusters of ages varying from 4 Myr--1.2 Gyr and Galactocentric distances from 6--12 kpc. We look for evidence of…

Astrophysics of Galaxies · Physics 2015-05-27 Priya Hasan , S N Hasan

An overview of our current understanding of the formation and evolution of star clusters is given, with main emphasis on high-mass clusters. Clusters form deeply embedded within dense clouds of molecular gas. Left-over gas is cleared within…

Astrophysics of Galaxies · Physics 2015-05-14 Soeren S. Larsen

The distribution of the number of clusters as a function of mass M and age T suggests that clusters get eroded or dispersed in a regular way over time, such that the cluster number decreases inversely as an approximate power law with T…

Astrophysics of Galaxies · Physics 2015-05-18 Bruce G. Elmegreen , Deidre A. Hunter

We present the first determination of the Galactic stellar mass function (MF) for low-mass stars (0.2-0.5 M_sun) at metallicities [Fe/H] < -1. A sample of ~53,000 stars was selected as metal-poor on the basis of both their halo-like orbits…

We exploit a combination of high-resolution Hubble Space Telescope and wide-field ESO-VLT observations to study the slope of the global mass function (alphaG) and its radial variation (alpha(r)) in the two dense, massive and post…

We have determined stellar mass functions of 120 Milky Way globular clusters and massive LMC/SMC star clusters based on a comparison of archival Hubble Space Telescope photometry with a large grid of direct N-body simulations. We find a…

Astrophysics of Galaxies · Physics 2023-05-03 Holger Baumgardt , Vincent Henault-Brunet , Nolan Dickson , Antonio Sollima

The luminosity function (LF) of young star clusters is often approximated by a power law function. For clusters in a wide range of galactic environments this has resulted in fit indices near -2, but on average slightly steeper. A…

Astrophysics of Galaxies · Physics 2009-08-21 M. Gieles

Accurate determinations of stellar mass functions and ages of stellar populations are crucial to much of astrophysics. We analyse the evolution of stellar mass functions of coeval main sequence stars including all relevant aspects of…

Solar and Stellar Astrophysics · Physics 2015-05-27 F. R. N. Schneider , R. G. Izzard , N. Langer , S. E. de Mink

(Abridged) Accurate luminosity functions (LF) for a dozen globular clusters have now been measured at or just beyond their half-light radius using HST. They span almost the entire cluster main sequence below ~ 0.75 Msolar. All these…

Astrophysics · Physics 2016-01-27 Francesco Paresce , Guido De Marchi

We present a measurement of the evolution of the stellar mass function (MF) of galaxies and the evolution of the total stellar mass density at 0<z<5. We use deep multicolor data in the Fors Deep Field (FDF; I-selected reaching I_AB=26.8)…

Astrophysics · Physics 2009-11-10 N. Drory , M. Salvato , A. Gabasch , R. Bender , U. Hopp , G. Feulner , M. Pannella

We compare the observed mass functions and age distributions of star clusters in six well-studied galaxies: the Milky Way, Magellanic Clouds, M83, M51, and Antennae. In combination, these distributions span wide ranges of mass and age:…

Astrophysics of Galaxies · Physics 2015-06-05 S. Michael Fall , Rupali Chandar