Rotating globular clusters. III. Evolutionary survey.

Details Rotating globular clusters. III. Evolutionary survey. Rotating globular clusters. III. Evolutionary survey.

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...319..839l&link_type=abstract

Astronomy and Astrophysics, v.319, p.839-849

Astronomy and Astrophysics

Astrophysics

4

Celestial Mechanics, Stellar Dynamics, Globular Clusters, Galaxies: Star Clusters, Magellanic Clouds

Scientific paper

We describe a simple model which allows us to investigate the effects of rotation on the evolution of globular clusters and of their flattening. The model relies on a generalization to rotating clusters of sequences of quasi-equilibrium models known as King sequences, which are able to follow the evolution of globular clusters prior to core collapse. Our model includes in a simplified way the effects of internal relaxation, tidal heating by passage through the Galactic disk, and stellar evolution. We investigate a broad range of initial conditions in the cluster mass, Galactocentric distance, initial mass function power-law index, initial concentration, and initial rotation energy. We also report the results of a similar study of the Large Magellanic Cloud clusters. The major findings of this investigation are the following: i) the combined effects of rotation, tidal shocking and stellar evolution is to reduce the domain of survival of rotating clusters to higher concentrations with respect to nonrotating ones; ii) rotating clusters reach core collapse at lower concentrations than their nonrotating counterparts; iii) the three modelled processes are likely to be responsible for the luminosity/flattening and relaxation timescale/flattening correlations reported in the literature; iv) the larger flattening of the Magellanic globular clusters is mostly the result of their large spread in age, as reported by Frenk and Fall (1982MNRAS.199..565F), and, to a lesser extent, of the smaller efficiency of the evolution in the Magellanic Cloud tidal environment with respect to the Galaxy, assuming similar initial conditions.

Affiliated with

Also associated with

No associations

Rating

Rotating globular clusters. III. Evolutionary survey. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Rotating globular clusters. III. Evolutionary survey., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotating globular clusters. III. Evolutionary survey. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1857975