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Inhomogeneities in Wolf-Rayet atmospheres

Published online by Cambridge University Press:  25 May 2016

Lars Koesterke ,
Wolf-Rainer Hamann  and
Götz Gräfener
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
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 248 - 249
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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