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Of-WN evolution: spectral types and effective temperatures

Published online by Cambridge University Press:  14 August 2015

E. Myckky Leep
E. Myckky Leep*
Affiliation:
Dept. of Astronomy, University of Washington, Seattle, W.A. 98195

Extract

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Because of the growing evidence (Conti 1976, Snow and Morton 1976, Chiosi et al. 1978, de Loore etal. 1977) that some Of stars are evolving into WN stars, we reexamine the classification of WN stars. There are four schemes for classifying WN stars, those of the IAU (1938), Hiltner and Schild (1966), Smith (1968), and Walborn (1974). All of these schemes involve estimating by eye the ratio of the nitrogen line strengths. Walborn's scheme is the most useful because he avoids problems that may arise from the use of helium lines. In other respects Walborn's scheme gives WN classifications similar to those found by Smith.

Type
Session 8: Evolutionary Scenario and the WR Connection
Information
Symposium - International Astronomical Union , Volume 83: Mass Loss and Evolution of O-Type Stars , 1979 , pp. 471 - 474
Copyright
Copyright © Reidel 1979 

References

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