Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...258..285p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 258, no. 2, p. 285-294.
Astronomy and Astrophysics
Astrophysics
7
Early Stars, Hot Stars, Magellanic Clouds, Stellar Mass Ejection, Stellar Winds, Wind Velocity, High Resolution, Iue, Spectral Resolution, Stellar Spectra
Scientific paper
The early-type stars in the Magellanic Clouds for which good quality high-resolution spectra with the IUE satellite exist have been studied for their stellar wind. Their P Cygni profiles in the N V, C IV, Si IV, O V, and N IV lines have been investigated with the Sobolev plus exact integration method. Particularly good fits of the theoretical with the observed profiles were obtained in the stars Sk -67 5, -67 111, -67 166 of the LMC, and in Sk 80 of the SMC, which are the only stars in the sample examined (7 stars) having a single 'optical' spectrum free from WR characteristics. A comparison with galactic early-type stars of the same spectral type indicates that the ratio of the M-dot(MC)/M-dot(MW) in these stars is about 0.5, in qualitative agreement with the prediction of the line-radiation-driven-wind theory, considering the lower metal abundances in the Magellanic Clouds in comparison with the Milky Way early-type stars.
Patriarchi Patrizio
Perinotto Mario
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