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Near infrared spectra of O stars and related objects

Published online by Cambridge University Press:  14 August 2015

J.M. Vreux  and
Y. Andrillat
J.M. Vreux
Affiliation:
Institut d'Astrophysique, Liège, Belgium
Y. Andrillat
Affiliation:
Observatoire de Haute Provence, France

Abstract

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The λ 10124 He II line has been found to be a measurable emission in three stars. Our new data are compared to theoretical predictions. The λ 10830 He I line is observed in emission in 74% of the 05–08 supergiants but only seen in 29 % of the dwarfs, all of the latter exhibiting some “pecularities” i.e. classified as Oef, Oe, ON or On. An envelope with a sufficient amount of material seems to be a favorable condition to get the λ 10830 line in emission. However the mechanism leading to the observed emission is temperature dependent as well.

Type
Session 3: Infrared and Radio Data
Information
Symposium - International Astronomical Union , Volume 83: Mass Loss and Evolution of O-Type Stars , 1979 , pp. 131 - 137
Copyright
Copyright © Reidel 1979 

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