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The inclusion of convection in stellar evolution models lacks realism, especially near convective-radiative interfaces. Furthermore, the interaction of convection with oscillations prevent us from accurately predicting seismic frequencies,…

Solar and Stellar Astrophysics · Physics 2025-10-31 J. Philidet , K. Belkacem

This paper is the third in a series presenting the results of direct numerical integrations of the Fokker-Planck equation for stars orbiting a supermassive black hole (SBH) at the center of a galaxy. The algorithm of Paper II included…

Astrophysics of Galaxies · Physics 2016-03-01 David Merritt

We discuss the space-and-time-dependent Monte Carlo code we have developed to simulate the relativistic radiation output from compact astrophysical objects, coupled to a Fokker-Planck code to determine the self-consistent lepton…

Astrophysics · Physics 2009-10-31 M. Boettcher , E. P. Liang

Context. Globular clusters (GCs) are suggested to host many stellar-mass black holes (BHs) at their centers, thus resulting in ideal testbeds for BH formation and retention theories. BHs are expected to play a major role in GC structural…

Astrophysics of Galaxies · Physics 2024-09-04 A. Della Croce , F. I. Aros , E. Vesperini , E. Dalessandro , B. Lanzoni , F. R. Ferraro , B. Bhat

We present a new semi-analytical model of galaxy formation, GECO (Galaxy Evolution COde), aimed at a better understanding of when and how the two processes of star formation and galaxy assembly have taken place. Our model is structured into…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 E. Ricciardelli , A. Franceschini

Black holes (BHs) play a major role in the structural and dynamical evolutions of Globular Clusters (GCs). Several recent works searched for BHs in Galactic GCs using scaling relations derived from numerical simulations. However, the…

Astrophysics of Galaxies · Physics 2025-10-20 Alessandro Della Croce

We present a method which extends Monte Carlo studies to situations that require a large dynamic range in particle number. The underlying idea is that, in order to calculate the collisional evolution of a system, some particle interactions…

Astrophysics · Physics 2009-11-13 C. W. Ormel , M. Spaans

The crystallization of a metastable melt is one of the most important non equilibrium phenomena in condensed matter physics, and hard sphere colloidal model systems have been used for several decades to investigate this process by…

Soft Condensed Matter · Physics 2015-05-20 Tanja Schilling , Sven Dorosz , Hans Joachim Schoepe , George Opletal

The rotational evolution of a young stellar population can give informations about the rotation pattern of more evolved clusters. Combined with rotational period values of thousands of young stars and theoretical propositions about the…

Solar and Stellar Astrophysics · Physics 2021-11-18 Maria Jaqueline Vasconcelos , Jérôme Bouvier , Florian Gallet , Edson A. Luz Filho

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

This paper concentrates on four key tools for performing star cluster simulations developed during the last decade which are sufficient to handle all the relevant dynamical aspects. First we discuss briefly the Hermite integration scheme…

Astrophysics · Physics 2009-10-31 Sverre J. Aarseth

We present a new version of the fast star cluster evolution code Evolve Me A Cluster of StarS (EMACSS). While previous versions of EMACSS reproduced clusters of single-mass stars, this version models clusters with an evolving stellar…

Astrophysics of Galaxies · Physics 2015-06-19 Poul Alexander , Mark Gieles , Henny Lamers , Holger Baumgardt

Next generation galaxy surveys demand the development of massive ensembles of galaxy mocks to model the observables and their covariances, what is computationally prohibitive using $N$-body simulations. COLA is a novel method designed to…

Cosmology and Nongalactic Astrophysics · Physics 2016-04-07 Albert Izard , Martin Crocce , Pablo Fosalba

We present a new stellar evolution code and a set of results, demonstrating its capability at calculating full evolutionary tracks for a wide range of masses and metallicities. The code is fast and efficient, and is capable of following…

Astrophysics · Physics 2009-11-13 Attay Kovetz , Ofer Yaron , Dina Prialnik

Utilizing a series of N-body simulations, we argue that gravitationally bound stellar clusters of modest population evolve very differently from the picture presented by classical dynamical relaxation theory. The system's most massive stars…

Solar and Stellar Astrophysics · Physics 2015-05-19 Joseph M. Converse , Steven W. Stahler

We compile two samples of cluster galaxies with complimentary hydrodynamic and N-body analysis using FLASH code to ascertain how their differing populations drive their rotational profiles and to better understand their dynamical histories.…

Astrophysics of Galaxies · Physics 2019-10-22 Lawrence E. Bilton , Matthew Hunt , Kevin A. Pimbblet , Elke Roediger

Special high-accuracy direct force summation N-body algorithms and their relevance for the simulation of the dynamical evolution of star clusters and other gravitating N-body systems in astrophysics are presented, explained and compared…

Astrophysics · Physics 2007-05-23 R. Spurzem

Dense stellar systems such as globular clusters, galactic nuclei and nuclear star clusters are ideal loci to study stellar dynamics due to the very high densities reached, usually a million times higher than in the solar neighborhood; they…

Astrophysics of Galaxies · Physics 2015-05-19 Justus Schneider , Pau Amaro-Seoane , Rainer Spurzem

In this paper the influence of galaxy cluster halo environment on the deflection properties of its galaxies is investigated. For this purpose circular and elliptical projected cluster haloes obeying Einasto density profiles are multiply…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Alexander L. Poplavsky

Space-based observations are beginning to yield detailed information about the stellar kinematics at the very centers of galaxies, within the sphere of gravitational influence of the black hole. The structure and dynamics of these regions…

Astrophysics · Physics 2007-05-23 D. Merritt , F. Cruz , M. Milosavljevic