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We present new models of the evolution and dissolution of star clusters evolving under the combined influence of internal relaxation and external tidal fields, using the anisotropic gaseous model based on the Fokker-Planck approximation,…

Astrophysics · Physics 2009-11-10 R. Spurzem , M. Giersz , K. Takahashi , A. Ernst

We investigate the long-term dynamical evolution of the internal kinematics of multimass rotating star clusters. We have performed a set of N-body simulations to follow the internal evolution of clusters with different degrees of initial…

Astrophysics of Galaxies · Physics 2022-07-06 Alexander R. Livernois , Enrico Vesperini , Anna Lisa Varri , Jongsuk Hong , Maria Tiongco

The immense amount of time series data produced by astronomical surveys has called for the use of machine learning algorithms to discover and classify several million celestial sources. In the case of variable stars, supervised learning…

Solar and Stellar Astrophysics · Physics 2022-10-12 R. Pantoja , M. Catelan , K. Pichara , P. Protopapas

Dynamical friction and tidal disruption are effective mechanisms of evolution of globular cluster systems, especially in non-axysimmetric galaxies with a central compact nucleus. With a semi-analytical approach based on the knowledge of the…

Astrophysics · Physics 2016-08-30 R. Capuzzo-Dolcetta , A. Tesseri

We investigate the ability of the Croton et al. (2006) semi-analytic model to reproduce the evolution of observed galaxies across the final 7 billion years of cosmic history. Using Monte-Carlo Markov Chain techniques we explore the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Simon J. Mutch , Gregory B. Poole , Darren J. Croton

More than 50 years have elapsed since the first studies of star clusters in the Magellanic Clouds. The wealth of data accumulated since then has not only revealed a large cluster system, but also a diversified one, filling loci in the age,…

Astrophysics · Physics 2009-11-13 B. X. Santiago

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

Information about the last stages of a binary neutron star inspiral and the final merger can be extracted from quasi-equilibrium configurations and dynamical evolutions. In this article, we construct quasi-equilibrium configurations for…

We recently used a large set of Monte Carlo simulations of globular clusters (GCs) to define new fully empirical parameters (named A5, P5, and S2.5) able to trace the internal dynamical evolution of dense stellar systems. These parameters…

Astrophysics of Galaxies · Physics 2026-01-27 Barbara Lanzoni , Francesco R. Ferraro , Enrico Vesperini

Any realistic theory of galaxy formation must be set in the context of a model for the formation of structure in the universe. We describe a powerful approach -- semi-analytic modelling -- that combines a set of simple rules describing the…

Astrophysics · Physics 2007-05-23 C. M. Baugh , S. Cole , C. S. Frenk , A. J. Benson , C. G. Lacey

We investigate Roche lobe overflow mass transfer (MT) in eccentric binary systems between stars and compact objects (COs), modeling the coupled evolution of both the star and the orbit due to eccentric MT (eMT) in a self-consistent…

We have carried out a large set of N-body simulations studying the effect of residual-gas expulsion on the survival rate and final properties of star clusters. We have varied the star formation efficiency, gas expulsion timescale and…

Astrophysics · Physics 2009-11-13 Holger Baumgardt , Pavel Kroupa

In a series of three papers, we introduced a novel cluster formation model that describes the formation, growth, and disruption of star clusters in high-resolution cosmological simulations. We tested this model on a Milky Way-sized galaxy…

Astrophysics of Galaxies · Physics 2020-03-18 Hui Li , Oleg Gnedin

We present an upgraded version of the \MOCCA code for the study of dynamical evolution of globular clusters (GCs) and its first application to the study of evolution of multiple stellar populations. We explore initial conditions spanning…

The dynamical evolution of stellar clusters is driven to a large extent by their environment. Several studies so far have considered the effect of tidal fields and their variations, such as, e.g., from giant molecular clouds, galactic…

Astrophysics of Galaxies · Physics 2015-05-30 I. Berentzen , E. Athanassoula

We present a flexible, detailed model for the evolution of galactic discs in a cosmological context since $z\approx 4$, including a physically-motivated model for radial transport of gas and stars within galactic discs. This expansion…

Astrophysics of Galaxies · Physics 2019-06-19 John C. Forbes , Mark R. Krumholz , Joshua S. Speagle

Mixing processes such as convection, overshooting and rotational mixing have long been known to affect the evolutionary properties of low-mass stars. While modeling a 1.2 Msun star, we encountered a semiconvective region outside the fully…

Solar and Stellar Astrophysics · Physics 2015-05-14 V. Silva Aguirre , J. Ballot , A. Serenelli , A. Weiss

Globular clusters are stellar dynamical systems which evolve on stellar evolutionary and both internal and external dynamical timescales. Quantitative comparison of cluster properties with realistic evolutionary dynamical models is becoming…

Astrophysics · Physics 2007-05-23 Gerard Gilmore

Most stars are born in dense stellar environments where the formation and early evolution of planetary systems may be significantly perturbed by encounters with neighbouring stars. To investigate on the fate of circumstellar gas disks and…

Earth and Planetary Astrophysics · Physics 2023-09-14 Francesco Flammini Dotti , Roberto Capuzzo-Dolcetta , M. B. N. Kouwenhoven

The tidal tails of stellar clusters provide an important tool for studying the birth conditions of the clusters and their evolution, coupling, and interaction with the Galactic potential. We present the N-body evolution of a Hyades-like…

Astrophysics of Galaxies · Physics 2021-03-24 Tereza Jerabkova , Henri M. J. Boffin , Giacomo Beccari , Guido de Marchi , Jos H. J. de Bruijne , Timo Prusti