Statistics – Applications
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..14e..18e&link_type=abstract
Modelling Dense Stellar Systems, 26th meeting of the IAU, Joint Discussion 14, 22-23 August 2006, Prague, Czech Republic, JD14,
Statistics
Applications
Scientific paper
We model the evolution of star clusters in galactic centres. Such star clusters are subject to strong tidal fields, while their orbits are decaying due to dynamical friction. One of our aims is to consider circular as well as eccentric star cluster orbits. We treat the evolution of the orbital parameters of such star clusters in the tidal field of the host galaxy in a semi- analytical way with a generalized dynamical friction formula, which incorporates density gradients, anisotropy and different self-consistent distribution functions of the galactic bulge's stellar background. However, typical relaxation processes governing the internal dynamical evolution of the star cluster, like escape of stars, core collapse and mass segregation are followed with direct N-body simulations, using NBODY6TID, a parallel N-body code derived from NBODY6++ with a special three-dimensional treatment of strong external forces without any approximations (e.g. no tidal approximation). Stellar evolution will be traced as well. Applications in the Milky Way include the young starburst clusters Arches and Quintuplet at projected galactocentric radii of l ess than 35 pc and the formation of comoving groups like IRS 13 in the central parsec of our Galaxy.
Ernst Arthur
Just Andreas
Spurzem Rainer
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