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We investigate the evolution of binary fractions in star clusters using N-body models of up to 100000 stars. Primordial binary frequencies in these models range from 5% to 50%. Simulations are performed with the NBODY4 code and include a…

Astrophysics · Physics 2009-06-23 Jarrod R. Hurley , Sverre J. Aarseth , Michael M. Shara

The basic properties of the candidate binary cluster population in the Magellanic Clouds and Galaxy are similar. The fraction of candidate binary systems is $\sim$10% and the pair separation histogram exhibits a bimodal distribution…

Astrophysics of Galaxies · Physics 2013-05-28 Raúl de la Fuente Marcos , Carlos de la Fuente Marcos

We use direct $N$-body calculations to investigate the impact of primordial mass segregation on the size scale and mass-loss rate of star clusters in a galactic tidal field. We run a set of simulations of clusters with varying degrees of…

Astrophysics of Galaxies · Physics 2015-06-22 Hosein Haghi , Seyed Mohammad Hoseini-Rad , Akram Hasani Zonoozi , Andreas H. W. Kuepper

Understanding the formation and evolution of young star clusters requires quantitative statistical measures of their structure. We investigate the structures of observed and modelled star-forming clusters. By considering the different…

Astrophysics · Physics 2007-05-23 S. Schmeja , R. S. Klessen

We study the evolution of bound pairs of star clusters by means of direct N-body simulations. Our simulations include mass loss by stellar evolution. The initial conditions are selected to mimic the observed binary star cluster NGC 2136 and…

Astrophysics · Physics 2008-11-26 Simon Portegies Zwart , Stephanie Rusli

The radii of young (<100 Myr) star clusters correlate only weakly with their masses. This shallow relation has been used to argue that impulsive tidal perturbations, or `shocks', by passing giant molecular clouds (GMCs) preferentially…

Astrophysics of Galaxies · Physics 2016-09-19 Mark Gieles , Florent Renaud

Star clusters - open and globulars - experience dynamical evolution on time scales shorter than their age. Consequently, open and globular clusters provide us with unique dynamical laboratories for learning about two-body relaxation, mass…

Astrophysics · Physics 2007-05-23 Georges Meylan

(Abridged) Interacting galaxies are well-known for their high star formation rates and rich star cluster populations, but the rapidly changing tidal field can also efficiently destroy clusters. We use numerical simulations of merging disc…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 J. M. Diederik Kruijssen , F. Inti Pelupessy , Henny J. G. L. M. Lamers , Simon F. Portegies Zwart , Nate Bastian , Vincent Icke

We use direct N-body simulations to investigate the evolution of star clusters with large size-scales with the particular goal of understanding the so-called extended clusters observed in various Local Group galaxies, including M31 and…

Astrophysics of Galaxies · Physics 2015-05-19 Jarrod R. Hurley , A. Dougal Mackey

Most stars in galactic disks are believed to be born as a member of star clusters or associations. Star clusters formed in disks are disrupted due to the tidal stripping and the evolution of star clusters themselves, and as a results new…

Astrophysics of Galaxies · Physics 2015-06-11 M. S. Fujii , J. Baba

Understanding the evolution of stellar clusters in an evolving tidal field is critical for studying the disruption of stellar clusters in a cosmological context. We systematically characterise the response of stellar clusters to tidal…

Astrophysics of Galaxies · Physics 2019-05-15 Jeremy J. Webb , Marta Reina-Campos , J. M. Diederik Kruijssen

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

[abridged] We extend our analysis of the dynamical evolution of simple star cluster models, in order to provide comparison standards that will aid in interpreting the results of more complex realistic simulations. We augment our previous…

Astrophysics · Physics 2008-11-26 M. Trenti , D. C. Heggie , P. Hut

Galactic globular clusters are old, dense star systems typically containing 10\super{4}--10\super{7} stars. As an old population of stars, globular clusters contain many collapsed and degenerate objects. As a dense population of stars,…

Solar and Stellar Astrophysics · Physics 2015-05-30 Matthew J. Benacquista , Jonathan M. B. Downing

We present N-body simulations of globular clusters, in orbits around the Galaxy, in order to study quantitatively and geometrically the tidal effects they encounter. The clusters are modelised with multi-mass King-Michie models (Michie…

Astrophysics · Physics 2010-03-01 F. Combes , S. Leon , G. Meylan

We report the results of our three-dimensional radiation hydrodynamics simulation of collapsing unmagnetized molecular cloud cores. We investigate the formation and evolution of the circumstellar disk and the clumps formed by disk…

Solar and Stellar Astrophysics · Physics 2015-06-16 Yusuke Tsukamoto , Masahiro N. Machida , Shuichiro Inutsuka

We report on the results of a direct N-body simulation of a star cluster that started with N = 200 000, comprising 195 000 single stars and 5 000 primordial binaries. The code used for the simulation includes stellar evolution, binary…

Astrophysics of Galaxies · Physics 2015-06-11 Jarrod R. Hurley , Michael M. Shara

The discovery of multiple stellar populations in globular clusters has implications for all the aspects of the study of these stellar systems. In this paper, by means of N-body simulations, we study the evolution of binary stars in…

Observations and theory both suggest that star clusters form sub-virial (cool) with highly sub-structured distributions. We perform a large ensemble of N-body simulations of moderate-sized (N=1000) cool, fractal clusters to investigate…

Astrophysics of Galaxies · Physics 2015-05-18 Richard J. Allison , Simon P. Goodwin , Richard J. Parker , Simon F. Portegies Zwart , Richard de Grijs

Increasing evidences provided primarily by the cluster lensing and numerical simulations of cluster formation indicate that galaxy clusters may contain compact cores that are substantially smaller than the cores revealed by the X-ray…

Astrophysics · Physics 2007-05-23 Tzihong Chiueh , Xiang-Ping Wu