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Composite Colour-Magnitude and Colour-Colour Diagrams for Be Stars in Open Clusters

Published online by Cambridge University Press:  14 August 2015

J.-C. Mermilliod
J.-C. Mermilliod*
Affiliation:
Institut d'Astronomie de l'Université de Lausanne et Observatoire de Genève

Extract

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By the end of 1980, the total number of Be stars discovered in the field of open clusters amounted to 180 stars distributed in 60 clusters. Among these, 110 Be stars belong to 32 clusters included in the sample I studied, which contains 75 open clusters younger than the Hyades. But only 88 stars with complete UBV photoelectric photometry have been taken into consideration here. The concept of age groups, defined elsewhere (Mermilliod 1981a), is used throughout the present analysis, as well as the new estimate of the colour excesses and distance moduli I obtained for these 32 clusters. Under the assumption of uniform reddening across the clusters, absolute magnitudes and dereddened colour indices have been calculated for the 88 Be stars.

Type
I. Photometry
Information
Symposium - International Astronomical Union , Volume 98: Be Stars , 1982 , pp. 23 - 26
Copyright
Copyright © Reidel 1982 

References

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