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Anomalies in the uvbyβ Parameters of Young Open Clusters

Published online by Cambridge University Press:  14 August 2015

R. R. Shobbrook
R. R. Shobbrook*
Affiliation:
Dept. of Astronomy, University of Sydney, N.S.W., 2006, Australia

Extract

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An investigation has been made of the Mv/co diagrams of six young galactic clusters - three in the north and three in the south, as listed on Figure 1. The uvbyß photometry of NGC 3293 is from unpublished observations of 42 stars by the author. From the Mv/co parameters of the ß Cep stars, which have evolved to the end of core hydrogen burning (Shobbrook 1978), the ages of Lac OB I, NGC 3293 and NGC 4755 were calculated using the models of Cogan to be 18, 10 and from 8.5 to 16 million years, respectively.

Type
August 28 Open Clusters
Information
Symposium - International Astronomical Union , Volume 85: Star Clusters , 1980 , pp. 253 - 254
Copyright
Copyright © Reidel 1980 

References

Crawford, D. L.: 1978, Astron. J. 83, 48.Google Scholar
Shobbrook, R. R.: 1976, Mon. Not. Roy. Astr. Soc. 176, 673.Google Scholar
Shobbrook, R. R.: 1978, Mon. Not. Roy. Astr. Soc. 185, 825.Google Scholar