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- W1968138857 abstract "view Abstract Citations (155) References (71) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS WC Stars: Hot Stars with Cold Winds Hillier, D. J. Abstract The atmospheric structure of WC stars is studied. Detailed models reveal that the ionization of the envelope systematically decreases farther out into the wind. C(4+) and He(2+) dominate close to the star while C(2+) and He(+) dominate the outer regions. Ionizations from excited states play a key role in determining the envelope ionization structure. A 'Stromgren sphere' ionization front occurs in the stellar wind due to the proximity of the C(2+) ionization edge to that of He(+). The temperature structures at densities less than 10 to the 11th can be derived from a simple 'nebular analysis'. The line and continuum fluxes of one model are compared with those observed for the WC5 star HD 165763, and the formation of individual lines is discussed in detail. The correlation of line width with ionization and excitation potential is theoretically discussed. The terminal velocity and velocity law are examined, and the C/He and O/C abundance estimates and their implications for the evolution of WC stars are considered. Publication: The Astrophysical Journal Pub Date: December 1989 DOI: 10.1086/168127 Bibcode: 1989ApJ...347..392H Keywords: Stellar Atmospheres; Stellar Winds; Wolf-Rayet Stars; Abundance; Electron Energy; Radiative Transfer; Spectral Line Width; Stellar Evolution; Stellar Spectra; Astrophysics; STARS: ABUNDANCES; STARS: MASS LOSS; STARS: WINDS; STARS: WOLF-RAYET full text sources ADS | data products SIMBAD (2)" @default.
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- W1968138857 date "1989-12-01" @default.
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- W1968138857 title "WC stars - Hot stars with cold winds" @default.
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