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Inhomogeneities in Wolf-Rayet atmospheres

Published online by Cambridge University Press:  25 May 2016

Lars Koesterke
Affiliation:
Universität Potsdam, Germany
Wolf-Rainer Hamann
Affiliation:
Universität Potsdam, Germany
Götz Gräfener
Affiliation:
Universität Potsdam, Germany

Extract

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By progress in both computer-speed and the development of efficient solution algorithms (Accelerated Lambda Iteration, ALI) nowadays detailed models for Wolf-Rayet atmospheres can be calculated on a desktop computer. In recent years much work was focused on the correct treatment of all relevant opacities, with the success that now hundreds of atomic levels and thousands of spectral lines of light elements (e.g., He, C, N, O) and millions of Fe lines can be accounted for in non-LTE. With respect to the opacities, these new models are complete but they are all based on the standard assumptions for WR atmospheres, namely spherically-symmetric expansion and stationarity and homogeneity of the outflow (cf. Hamann et al. these Proceedings).

Type
Part 2. Models for single star evolution of massive stars: wind + atmosphere + interior
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Baum, E., Hamann, W.-R., Koesterke, L., Wessolowski, U. 1992, A&A 266, 402 Google Scholar
Brown, J.C., Richardson, L.L., Antokhin, I., Robert, C., Moffat, A.F.J., St-Louis, N. 1995, A&A 295, 725 Google Scholar
Feldmeier, A. 1995, A&A 299, 523 Google Scholar
Hillier, D.J. 1984, ApJ 280, 744 Google Scholar
Pollock, A.M.T., Haberl, F., Corcoran, M.F. 1995, in: van der Hucht, K.A. & Williams, P.M. (eds.), Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution, Proc. IAU Symp. No. 163 (Dordrecht: Kluwer), p. 512 CrossRefGoogle Scholar
Owocki, S.P., Castor, J.I., Rybicki, G.B. 1988, ApJ 335, 914 Google Scholar
Prinja, R.K., Smith, L.J. 1992, A&A 266, 377 Google Scholar
Schmutz, W. 1997, A&A 321, 268 Google Scholar