Evolution of star clusters on eccentric orbits: semi-analytical approach - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2019

Evolution of star clusters on eccentric orbits: semi-analytical approach

Hamid Ebrahimi
  • Fonction : Auteur
Hosein Haghi
  • Fonction : Auteur
Akram Hasani Zonoozi
  • Fonction : Auteur
Ghasem Safaei
  • Fonction : Auteur

Résumé

We study the dynamical evolution of star clusters on eccentric orbits using a semi-analytical approach. In particular we adapt and extend the equations of the EMACSS code, introduced by Gieles et al., to work with eccentric orbits. We follow the evolution of star clusters in terms of mass, half-mass radius, core radius, Jacobi radius, and the total energy over their dissolution time. Moreover, we compare the results of our semi-analytical models against N-body computations of clusters with various initial half-mass radii, numbers of stars, and orbital eccentricities to cover both tidally filling and underfilling systems. The evolution profiles of clusters obtained by our semi-analytical approach closely follow those of N-body simulations in different evolutionary phases of star clusters, from pre-collapse to post-collapse. Given that the average runtime of our semi-analytical models is significantly less than that of N-body models, our approach makes it feasible to study the evolution of large samples of globular clusters on eccentric orbits.
Fichier principal
Vignette du fichier
stz1034.pdf (1.56 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

insu-03703849 , version 1 (09-07-2022)

Identifiants

Citer

Hamid Ebrahimi, Hosein Haghi, Pouria Khalaj, Akram Hasani Zonoozi, Ghasem Safaei. Evolution of star clusters on eccentric orbits: semi-analytical approach. Monthly Notices of the Royal Astronomical Society, 2019, 486, pp.3203-3212. ⟨10.1093/mnras/stz1034⟩. ⟨insu-03703849⟩
46 Consultations
23 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More