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Spectral analyses of WC stars in the LMC

Published online by Cambridge University Press:  25 May 2016

Götz Gräfener ,
Wolf-Rainer Hamann  and
Lars Koesterke
Götz Gräfener
Affiliation:
Department of Physics, University of Potsdam, Germany
Wolf-Rainer Hamann
Affiliation:
Department of Physics, University of Potsdam, Germany
Lars Koesterke
Affiliation:
Department of Physics, University of Potsdam, Germany

Abstract

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Spectra of seven WC stars in the LMC are taken with the HST-FOS. They are analyzed by means of non-LTE models for spherically expanding atmospheres with complex model atoms of helium, carbon and oxygen taken into account. We find stellar luminosities in the range from 1051–56 L⊙. The stellar temperature T*, defined as the effective temperature related to the stellar core radius, is of the order of 100 kK. The atmospheric compositions show carbon mass fractions of about 0.4 and oxygen mass fractions in the range 0.1–0.5.

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. 240 - 241
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

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