Spectral analyses of Wolf-Rayet stars: the impact of clumping

W.-R. Hamann and L. Koesterke

Lehrstuhl Astrophysik der Universität Potsdam, Postfach 601553, D-14415 Potsdam, Germany

Inhomogeneities are accounted for in our non-LTE stellar wind models in a first-order approximation. When applied for spectral analyses, clumpy models yield lower mass-loss rates than homogeneous models, while other parameters are not affected. For representative WR stars, we determine the density contrast from the electron-scattering line wings and obtain mass-loss rate reductions by a factor of two, typically.

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