Stellar Parameters of Galactic WC stars

Andreas Sander, Wolf-Rainer Hamann

Institut für Physik und Astronomie, Universität Potsdam, Germany

Since the last large sample of Galactic WC stars had been analyzed in the middle of the 1990s, significant improvements have been achieved in the simulation of stellar-wind spectra. We have (partly re-)analyzed all available Galactic WC stars with the current generation of stellar atmosphere models computed with the Potsdam Wolf- Rayet (PoWR) code. In contrast to previous results, the obtained stellar parameters now show a close correlation with the WC subtype. The stellar temperatures form a sequence from 45 kK (WC9 subtype) to about 120 kK (WC4). For those stars with known distance, we also derived luminosities using flux-calibrated spectra and photo- metry.

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