Spectral analyses of 19 Wolf-Rayet (WN) stars in the LMC

Details Spectral analyses of 19 Wolf-Rayet (WN) stars in the LMC Spectral analyses of 19 Wolf-Rayet (WN) stars in the LMC

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...248..166k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 248, no. 1, Aug. 1991, p. 166-174. Research supported by DFG.

Astronomy and Astrophysics

Astrophysics

47

Astronomical Spectroscopy, Magellanic Clouds, Spectrum Analysis, Stellar Spectra, Wolf-Rayet Stars, Helium, Hertzsprung-Russell Diagram, Stellar Atmospheres, Stellar Evolution, Stellar Models

Scientific paper

Luminosities, radii, temperatures, and mass-loss rates are obtained by multilevel non-LTE model calculation analyses of the He spectra of 19 WR star-sample in the LMC which covers several different subtypes of the nitrogen, or 'WN' sequence. The results thus obtained are compared with a Galactic sample which had been previously analyzed with the same methods. The LMC stars tend to have lower luminosities than the Galactic sample; terminal wind velocities and mass-loss rates show no systematic differences between LMC and Galaxy when stars of the same subtype are compared. The evolutionary status of the WR stars is discussed by comparing their HR diagram position with theoretically predicted tracks for post-red-supergiant evolution.

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