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Related papers: The life cycle of star cluster in a tidal field

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We present a simple theory for the evolution of initially compact clusters in a tidal field. The fundamental ingredient of the model is that a cluster conducts a constant fraction of its own energy through the half-mass radius by two-body…

Astrophysics of Galaxies · Physics 2013-01-24 Mark Gieles

Evaporative evolution of stellar clusters is shown to be relaxation limited when the number of stars satisfies $N>>N_c$, where $N_c\simeq 1600$. For a Maxwell velocity distribution that extends beyond the escape velocity, this process is…

Astrophysics of Galaxies · Physics 2015-06-03 Maurice H. P. M. van Putten

We use N-body simulations to explore the influence of orbital eccentricity on the dynamical evolution of star clusters. Specifically we compare the mass loss rate, velocity dispersion, relaxation time, and the mass function of star clusters…

Astrophysics of Galaxies · Physics 2015-06-19 Jeremy J. Webb , Nathan Leigh , Alison Sills , William E. Harris , Jarrod R. Hurley

We report results of a large set of N-body calculations aimed to study the evolution of multi-mass star clusters in external tidal fields. Our clusters start with the same initial mass-functions, but varying particle numbers, orbital types…

Astrophysics · Physics 2009-11-07 Holger Baumgardt , Junichiro Makino

We study the combined effects of relaxation, tidal heating and binary heating on globular cluster evolution, exploring the physical consequences of external effects and examining evolutionary trends in the Milky Way population. Our analysis…

Astrophysics · Physics 2015-06-24 C. Murali , M. D. Weinberg

Outer-halo globular clusters show large half-light radii and flat stellar mass functions, depleted in low-mass stars. Using N-body simulations of globular clusters on eccentric orbits within a Milky Way-like potential, we show how a…

The evolution of star clusters is studied using N-body simulations in which the evolution of single stars and binaries are taken self-consistently into account. Initial conditions are chosen to represent relatively young Galactic open…

We present the results of a set of N-body simulations following the long-term evolution of the rotational properties of star cluster models evolving in the external tidal field of their host galaxy, after an initial phase of violent…

Astrophysics of Galaxies · Physics 2017-07-19 Maria A. Tiongco , Enrico Vesperini , Anna Lisa Varri

The evolution of star clusters is determined by several internal and external processes. Here we focus on two dominant internal effects, namely energy exchange between stars through close encounters (two-body relaxation) and mass-loss of…

Astrophysics of Galaxies · Physics 2011-06-24 Mark Gieles

[abridged] We present a unified picture for the evolution of star clusters on the two-body relaxation timescale. We use direct N-body simulations of star clusters in a galactic tidal field starting from different multi-mass King models, up…

Astrophysics of Galaxies · Physics 2014-11-20 Michele Trenti , Enrico Vesperini , Mario Pasquato

We investigate the long-term dynamical evolution of two distinct stellar populations of low-mass stars in globular clusters in order to study whether the energy equipartition process can explain the high number of stars harbouring abundance…

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

We present N-body simulations of realistic globular clusters containing initial mass function in the galaxy to study effects of tidal field systematically on the properties of outer parts of globular clusters. Using NBODY6 which takes into…

Astrophysics · Physics 2009-11-10 Kang Hwan Lee , Hyung Mok Lee , Hwankyung Sung

The mass evaporation rate of globular clusters evolving in a strong Galactic tidal field is derived through the analysis of large, multi-mass $N$-body simulations. For comparison, we also study the same evaporation rates using MOCCA Monte…

Astrophysics of Galaxies · Physics 2017-07-19 Juan P. Madrid , Nathan W. C. Leigh , Jarrod R. Hurley , Mirek Giersz

Dense star clusters expand until their sizes are limited by the tidal field of their host galaxy. During this expansion phase the member stars evolve and lose mass. We show that for clusters with short initial relaxation time scales (<~100…

Solar and Stellar Astrophysics · Physics 2012-09-11 Mark Gieles

We study the dynamical evolution of globular clusters using our H\'enon-type Monte Carlo code for stellar dynamics including all relevant physics such as two-body relaxation, single and binary stellar evolution, Galactic tidal stripping,…

Astrophysics of Galaxies · Physics 2015-06-05 Sourav Chatterjee , Stefan Umbreit , John M. Fregeau , Frederic A. Rasio

We study the rate of escape of stars (``evaporation'') from tidally-limited postcollapse globular clusters having a power-law distribution of stellar masses. We use a multi-mass Fokker-Planck code and assume a steady tidal field.…

Astrophysics · Physics 2007-05-23 Hyung Mok Lee , Jeremy Goodman

We have modeled in detail the evolution of rich open star clusters such as the Pleiades, Praesepe and Hyades, using simulations that include stellar dynamics as well as the effects of stellar evolution. The dynamics is modeled via direct…

Astrophysics · Physics 2009-11-07 Simon Portegies Zwart , Piet Hut , Steve McMillan , Jun Makino

We introduce the star cluster evolution code Evolve Me A Cluster of StarS (EMACSS), a simple yet physically motivated computational model that describes the evolution of some fundamental properties of star clusters in static tidal fields.…

Astrophysics of Galaxies · Physics 2015-06-04 Poul E. R. Alexander , Mark Gieles

We present a series of simple, largely analytical models to compute the effects of disruption on the mass function of star clusters. Our calculations include evaporation by two-body relaxation and gravitational shocks and mass loss by…

Astrophysics · Physics 2009-11-06 S. Michael Fall , Qing Zhang

Evolution with mass segregation and the evolution of the rotation of cores are both discussed for self-similar core collapse. Evolution with angular velocity proportional to the square root of the density is predicted. On the Dynamical Main…

Astrophysics · Physics 2007-05-23 Donald Lynden-Bell
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