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SIT-VIDICON Surface Photometry of Globular Clusters in the Magellanic Clouds

Published online by Cambridge University Press:  04 August 2017

Edward H. Geyer  and
Andreas Hänel
Edward H. Geyer
Affiliation:
Observatorium Hoher List der Universitätssternwarte Bonn, D-5568 Daun, FRG
Andreas Hänel
Affiliation:
Observatorium Hoher List der Universitätssternwarte Bonn, D-5568 Daun, FRG

Extract

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The globular clusters in the Large Magellanic Cloud offer an unique possibility for the study of their spatial structures. Their ages show a very wide range from 6·107 to >5·109 years which is unknown for their galactic counterparts. The latter ones are all very old and therefore dynamically relaxed systems, whereas the young globular clusters of the Magellanic Clouds (age <108 years) have still preserved the dynamical state with which they were formed (Geyer et al. 1979). Furthermore, these young globulars show in their Hertzsprung-Russell diagram morphology the massive and luminous stars still on the main sequence with only a few evolved red supergiants. As in general the luminosity of the individual stars depends on their evolutionary state, the total mass to total luminosity ratio of a stellar cluster represents also its evolutionary state.

Type
Magellanic Cloud Clusters
Information
Symposium - International Astronomical Union , Volume 108: Structure and Evolution of the Magellanic Clouds , 1984 , pp. 29 - 30
Copyright
Copyright © Reidel 1984 

References

Geyer, E.H.; Hänel, A.: 1982, ESO Messenger 29, 5 Google Scholar
Geyer, E.H.; Hopp, U.: 1982, Astrophys. Space Sci. 84, 133 Google Scholar
Geyer, E.H.; Hopp, U.; Kiehl, M.; Witzigmann, S.: 1979, Astron. Astrophys. 77, 61 Google Scholar