Abstract
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.
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© 1979 International Astronomical Union
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Vreux, J.M., Andrillat, Y. (1979). Near Infrared Spectra of O Stars and Related Objects. In: Conti, P.S., De Loore, C.W.H. (eds) Mass Loss and Evolution of O-Type Stars. International Astronomical Union/Union Astronomique Internationale, vol 83. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9452-2_20
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DOI: https://doi.org/10.1007/978-94-009-9452-2_20
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