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Observed Dynamical Parameters of Star Clusters in the SMC

Published online by Cambridge University Press:  04 August 2017

E. Kontizas  and
M. Kontizas
E. Kontizas
Affiliation:
Observatory of Athens, University of Athens
M. Kontizas
Affiliation:
Observatory of Athens, University of Athens

Extract

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The dynamical study of the SMC clusters is very important for many reasons. (a) The disk “blue” clusters are more massive and older than the galactic open clusters whereas the “halo” red clusters are less massive and younger than the galactic globulars (Kontizas, Danezis, Kontizas, 1982; Kontizas and Kontizas, 1983). (b) All clusters show density profiles that fit the available theoretical models (King, 1962) giving evidence of relaxed systems, even for the young clusters with evolutionary ages 106−108yr. The relaxation mechanism has to be reconsidered for the SMC and possibly in connection to the metal abundance. (c) The ellipticities of young and old SMC clusters have shown that there is no obvious age-ellipticity dependance and that the SMC clusters are statistically more elliptical than the clusters of the LMC and our Galaxy (Frenk and Fall, 1982, Kontizas et al, 1984).

Type
May 29: Observations of Globular Clusters
Information
Symposium - International Astronomical Union , Volume 113: Dynamic of Stars Clusters , 1985 , pp. 85 - 87
Copyright
Copyright © Reidel 1985 

References

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