Spectral analysis of the Wolf-Rayet star HD 50896

Details Spectral analysis of the Wolf-Rayet star HD 50896 Spectral analysis of the Wolf-Rayet star HD 50896

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...194..190h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 194, no. 1-2, April 1988, p. 190-196.

Astronomy and Astrophysics

Astrophysics

68

Line Spectra, Radiative Transfer, Spectrum Analysis, Stellar Mass Ejection, Wolf-Rayet Stars, Helium, Stellar Atmospheres, Stellar Models, Stellar Structure

Scientific paper

The helium spectrum of the Wolf-Rayet star HD 50896 is analyzed by means of detailed non-LTE radiation transfer calculations for spherically expanding atmospheres. Satisfactory agreement between theory and observation is achieved. A systematic fit procedure yields the stellar parameters as a function of the mass-loss rate adopted. Fits are performed for the three different values log(M/(M_sun;/yr)) = -0.4, -4.4 or -4.7. The resulting luminosities are log(L/L_sun;) = 5.3, 4.9 or 4.4, respectively, while the radius of the "stellar core" becomes 4.7, 2.6 or 1.5 R_sun;. Considerations concerning the distance of HD 50896 give some preference to the first of the three quoted sets of parameters.

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