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Spectral Classification in the Small Magellanic Cloud

Published online by Cambridge University Press:  14 August 2015

P. Dubois ,
M. Jaschek  and
C. Jaschek
P. Dubois
Affiliation:
Observatoire de Strasbourg, France
M. Jaschek
Affiliation:
Observatoire de Strasbourg, France
C. Jaschek
Affiliation:
Observatoire de Strasbourg, France

Abstract

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This paper presents results obtained in classifying 26 supergiants of the Small Magellanic Cloud. The main results are:

  1. – The hydrogen lines are not as sharp as expected for such luminous stars.

  2. – Generally, for the A-type stars, the calcium K-line is too strong compared to the other metallic lines.

  3. – There are differences in the behaviour of the different metals.

  4. – Often, the stars present variations in their spectra.

  5. – 50% of the stars brighter than mv = 11.3 have an enhancement of the H8 Balmer line, which is one of the characteristics of a shell star.

  6. – The comparison with the Radcliffe classification and Dachs classification is, except in very few cases, in good agreement.

Type
Part IV/Abundance Effects in Spectral Classification
Information
Symposium - International Astronomical Union , Volume 72: Abundance Effects in Classification , 1976 , pp. 149 - 152
Copyright
Copyright © Reidel 1976 

References

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