Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..173p&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Sept. 1, 1987, p. 173-192.
Astronomy and Astrophysics
Astronomy
15
Early Stars, Magellanic Clouds, Stellar Spectrophotometry, Stellar Winds, Ultraviolet Spectra, Giant Stars, Iue, Main Sequence Stars, Spaceborne Astronomy, Supergiant Stars, Wind Velocity
Scientific paper
Low-resolution IUE spectra are used to investigate stellar winds of early-type stars in the Small Magellanic Cloud (SMC). Model profiles are used to fit well developed P Cygni doublets noted in 25 main-sequence, giant, and supergiant stars. Terminal velocities in the SMC are found to be, generally, up to a factor of 2 lower relative to galactic O stars of similar luminosity, reaching differences of about 1000 km/s. Although a reduction by a factor of about 3 is noted in the SMC C IV wind column densities, the products of mass loss rate and ion fraction are not seen to differ significantly from those of corresponding galactic O stars. The present results may suggest SMC mass loss rates which are similar to those observed in galactic stars of similar luminosity.
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