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Upper limits for the effective temperature of Wolf-Rayet stars from the presence of He I

Published online by Cambridge University Press:  04 August 2017

W. Schmutz ,
W.-R. Hamann  and
U. Wessolowski
W. Schmutz
Affiliation:
Institut für theoretische Physik und Sternwarte der Universität Olshausenstrasse, D-2300 Kiel, Federal Republic of Germany
W.-R. Hamann
Affiliation:
Institut für theoretische Physik und Sternwarte der Universität Olshausenstrasse, D-2300 Kiel, Federal Republic of Germany
U. Wessolowski
Affiliation:
Institut für theoretische Physik und Sternwarte der Universität Olshausenstrasse, D-2300 Kiel, Federal Republic of Germany

Abstract

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A recently developed non-LTE code for realistic semi-empirical models of Wolf-Rayet atmospheres is used to calculate synthetic helium lines. From the resulting line strenghts it can be concluded that if He I lines are present, the effective temperatures of these stars have to be less than an upper limit. This limit depends on the stellar radius and is approximately 40kK for R* = 20 R⊙ to 60kK for R* = 5 R⊙.

Type
Mass Loss from Hot Stars
Information
Symposium - International Astronomical Union , Volume 122: Circumstellar Matter , 1987 , pp. 461 - 462
Copyright
Copyright © Reidel 1987 

References

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