Helge Todt

TL;DR: In this paper, the stellar parameters and mass-loss rates of the Galactic WC stars were analyzed using the Potsdam Wolf-Rayet (PoWR) model atmosphere code and a large grid of line-blanked models was established for the range of WC subtypes WC4 − WC8, and smaller grids for the WC9 parameter domain.

TL;DR: In this paper, the Potsdam Wolf-Rayet (PoWR) code was used for the analysis of massive stars with photospheric radiative pressure, and a small set of O-star models with the PoWR code was calculated using different approaches for the quasi-hydrostatic part.

TL;DR: In this paper, the stellar and atmospheric parameters of WC stars were derived for more than 50 Galactic WC stars and two WO stars, covering almost the whole Galactic WC population as far as the stars are single, and unobscured in the visual.

TL;DR: The Leibniz Graduate School for Quantitative Spectroscopy in Astrophysics (LSGSA) as mentioned in this paper was a joint project of AIP and the institute of Physics and Astronomy of the University of Potsdam.

TL;DR: In this paper, the Potsdam Wolf-Rayet (PoWR) model was used for WN star spectral lines, which includes the non-LTE solutions of the statistical equations for complex model atoms and the radiative transfer equation in the co-moving frame.