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We examine the pattern of star birth in the Orion Nebula Cluster (ONC), with the goal of discerning the cluster's formation mechanism. Outside of the Trapezium, the distribution of stellar masses is remarkably uniform, and is not accurately…

Astrophysics · Physics 2009-11-11 Eric M. Huff , Steven Stahler

We investigate the contraction of accreting protoclusters using an extension of n-body techniques that incorporates the accretional growth of stars from the gaseous reservoir in which they are embedded. Following on from Monte Carlo studies…

Solar and Stellar Astrophysics · Physics 2015-05-19 Nickolas Moeckel , Cathie J. Clarke

The mass of unresolved young star clusters derived from spectro-photometric data may well be off by a factor of 2 or more once the migration of massive stars driven by mass segregation is accounted for. We quantify this effect for a large…

Astrophysics · Physics 2009-11-11 J. -J. Fleck , C. M. Boily , A. Lançon , S. Deiters

Globular clusters are often assumed to be good tracers of major star formation episodes in their host galaxies. While observations over the past 2 decades have confirmed the presence of young objects with globular cluster-like properties in…

Astrophysics · Physics 2007-05-23 Soeren S. Larsen

The realization that most stars form in clusters, raises the question of whether star/planet formation are influenced by the cluster environment. The stellar density in the most prevalent clusters is the key factor here. Whether dominant…

Astrophysics of Galaxies · Physics 2015-06-11 S. Pfalzner , T. Kaczmarek , C. Olczak

In the last decade star clusters have been found in the centers of spiral galaxies across all Hubble types. We here present a spectroscopic study of the exceptionally bright (10^6 - 10^8 Lsun) but compact (Re ~ 5 pc) nuclear star clusters…

Until now it has been impossible to observationally measure how star cluster scale height evolves beyond 1Gyr as only small samples have been available. Here we establish a novel method to determine the scale height of a cluster sample…

Solar and Stellar Astrophysics · Physics 2015-06-22 Anne S. M. Buckner , Dirk Froebrich

The HST data archive contains images of several nearby spirals, suitable for detailed studies of the properties of individual star clusters and their surroundings. By combining structural information derived from HST images with…

Astrophysics · Physics 2007-05-23 Soeren S. Larsen

We investigate the evolution of young star clusters using N-body simulations. We confirm that subvirial and fractal-structured clusters will dynamically mass segregate on a short timescale (within 0.5 Myr). We adopt a modified…

Astrophysics of Galaxies · Physics 2015-05-27 Jincheng Yu , Richard de Grijs , Li Chen

This article reviews some recent studies of the mass, age, and space distributions of star clusters, with a primary focus on the large population of clusters in the interacting Antennae galaxies. Some of the highlights of these studies are…

Astrophysics · Physics 2007-05-23 S. Michael Fall

We have studied the long-term evolution of star clusters of the solar neighborhood, starting from their birth in gaseous clumps until their complete dissolution in the Galactic tidal field. We have combined the "local-density-driven cluster…

Astrophysics of Galaxies · Physics 2018-08-29 Bekdaulet Shukirgaliyev , Genevieve Parmentier , Andreas Just , Peter Berczik

JWST observations, when combined with HST data, promise to improve age estimates of star clusters in nearby spiral galaxies. However, feedback from young cluster stars pushes out the natal gas and dust, making cluster formation and…

The Large Magellanic Cloud is one of the nearest galaxies to us and is one of only few galaxies where the star formation history can be determined from studying resolved stellar populations. We have compiled a new catalogue of ages,…

Astrophysics of Galaxies · Physics 2015-06-05 Holger Baumgardt , Genevieve Parmentier , Peter Anders , Eva K. Grebel

The young (~2 Myr) cluster Chamaeleon I is one of the closest laboratories to study the early stages of star cluster dynamics in a low-density environment. We studied its structural and kinematical properties combining parameters from the…

(abridged) A scenario for the formation of multiple co-eval populations separated in age by about 1 Myr in very young clusters (VYCs, ages less than 10 Myr) and with masses in the range 600-20000 Msun is outlined. It rests upon a converging…

Astrophysics of Galaxies · Physics 2018-05-02 Pavel Kroupa , Tereza Jerabkova , František Dinnbier , Giacomo Beccari , Zhiqiang Yan

We use new WFC3 observations of the nearby grand design spiral galaxy M83 to develop two independent methods for estimating the ages of young star clusters. The first method uses the physical extent and morphology of Halpha emission to…

We examine the mass-dependence of the velocity dispersion of stars in the young cluster NGC 6530 to better understand how it formed. Using a large sample of members we find that the proper motion velocity dispersion increases with stellar…

Astrophysics of Galaxies · Physics 2019-09-04 Nicholas J. Wright , Richard J. Parker

We present a method to couple N-body star cluster simulations to a cosmological tidal field, using the Astrophysical Multipurpose Software Environment. We apply this method to star clusters embedded in the CosmoGrid dark matter-only…

Cosmology and Nongalactic Astrophysics · Physics 2013-11-05 Steven Rieder , Tomoaki Ishiyama , Paul Langelaan , Junichiro Makino , Stephen L. W. McMillan , Simon Portegies Zwart

After the stars of a new, embedded star cluster have formed they blow the remaining gas out of the cluster. Especially winds of massive stars and definitely the on-set of the first supernovae can remove the residual gas from a cluster. This…

Astrophysics · Physics 2009-11-11 M. Fellhauer , P. Kroupa

Context: Star clusters, composed of stars born from the same molecular cloud, serve as invaluable natural laboratories for understanding the fundamental processes governing stellar formation and evolution. Aims: This study aims to…