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Systematic main sequence photometry of globular cluster stars for age determination

Published online by Cambridge University Press:  04 August 2017

Gonzalo Alcaino  and
William Liller
Gonzalo Alcaino
Affiliation:
Instituto Isaac Newton, Ministerio de Educación de Chile, Santiago, Chile
William Liller
Affiliation:
Instituto Isaac Newton, Ministerio de Educación de Chile, Santiago, Chile

Extract

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The individual photometric study of the coeval stars in globular clusters presents one of the best observational tests of the stellar evolution theory. Our own globular cluster system provides fundamental clues to the dynamical and chemical evolutionary history of the galaxy, and the study of their ages give us a lower limit to the age of the galaxy as well as to that of the universe. We have been undertaking a systematic research program, and discuss herewith the ages deduced by fitting main sequence photometry to theoretical isochrones of six galactic globular clusters : M4, M22, M30, NGC 288, NGC 3201 and NGC 6397.

Type
I. EVOLUTION OF LOW AND INTERMEDIATE MASS STARS OBSERVATIONS AND MODELS
Information
Symposium - International Astronomical Union , Volume 105: Observational Tests of the Stellar Evolution Theory , 1984 , pp. 153 - 155
Copyright
Copyright © Reidel 1984 

References

Ciardullo, R. B., and Demarque, P.: 1977, Trans. Yale Univ. Obs., pp. 33.Google Scholar
VandenBerg, D.: 1983, Astrophys. J. Suppl. 51, pp. 29.CrossRefGoogle Scholar