Line-blanketed model atmospheres for WR stars

¹ Institut für Physik, Astrophysik, Universität Potsdam, Am Neuen Palais 10, 14469 Potsdam, Germany
² Institute of Astronomy, ETH Zentrum SEC, Scheuchzer Str. 7, 8092 Zürich, Switzerland
³ PMOD/WRC, 7260 Davos Dorf, Switzerland

Corresponding author: G. Gräfener, goetz@astro.physik.uni-potsdam.de

Received: 24 September 2001
Accepted: 20 February 2002

Abstract

We describe the treatment of iron group line-blanketing in non-LTE model atmospheres for WR stars. As an example, a blanketed model for the early-type WC star WR 111 is compared to its un-blanketed counterpart. Blanketing affects the ionization structure and the emergent flux distribution of our models. The radiation pressure, as computed within our models, falls short by only a factor of two to provide the mechanical power of the WR wind.