Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-30T01:33:29.358Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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

Abbott, D.C., Bieging, J.H., Churchwell, E., Torres, A.V.: 1986, Astrophys. J. 303, 239 Google Scholar
Cherepashchuk, A.M., Eaton, J.A., Khaliullin, Kh.F.: 1984, Astrophys. J. 281, 774 Google Scholar
Hamann, W.-R.: 1985, Astron. Astrophys. 145, 443 Google Scholar
Hamann, W.-R.: 1986, Astron. Astrophys. 160, 347 Google Scholar
Hamann, W.-R., Schmutz, W.: 1986, in press Google Scholar
Nussbaumer, H., Schmutz, W., Smith, L.J., Willis, A.J.: 1982, Astron. Astrophys. Suppl. 47, 257 Google Scholar
Schmutz, W., Hamann, W.-R.: 1986, Astron. Astrophys. Letters, in press Google Scholar
Underhill, A.B.: 1983, Astrophys. J. 266, 718 Google Scholar