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The galactic WN7/WN8 stars as massive O stars in advanced stages of evolution

Published online by Cambridge University Press:  14 August 2015

A.F.J. Moffat  and
W. Seggewiss
A.F.J. Moffat
Affiliation:
1Département de Physique, Université de Montréal
W. Seggewiss
Affiliation:
2Obs. Hoher List, Universitäts-Sternwarte Bonn

Abstract

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It is shown from various observational contraints that WN7/WN8 stars tend to occupy a class of their own set apart from other Wolf-Rayet subclasses. They probably evolved by stellar-wind mass loss from Of stars with original masses greater than ~35 m⊙, whether single or component of a binary. Two WN7/WN8 stars may be runaways in the second WR phase. One, HD 197406, is situated over 1000 pc from the galactic plane and has a low-mass, overluminous companion which is eclipsed by the WN7 component.

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. 447 - 459
Copyright
Copyright © Reidel 1979 

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