Astronomy and Astrophysics – Astronomy
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...256l..49b&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 256, May 15, 1982, p. L49-L54.
Astronomy and Astrophysics
Astronomy
27
Abundance, Early Stars, Magellanic Clouds, Milky Way Galaxy, Stellar Winds, Ultraviolet Astronomy, Absorption Spectra, B Stars, Carbon, Iue, O Stars, Plasma Acceleration, Silicon, Spectral Resolution, Stellar Mass Ejection, Stellar Spectra, Wind Velocity
Scientific paper
IUE low-resolution spectra of 11 OB stars in the Small Magellanic Cloud reveal considerably lower wind velocities than corresponding galactic stars. The reduced effectiveness of radiative acceleration due to lower abundances of heavy elements in the SMC is believed to be responsible for this effect. The absorption strengths of the SMC P Cygni profiles are somewhat weaker in Si IV and much weaker in C IV. Crude estimates of relative mass-loss rates suggest that the observed differences may be dominated by the differing relative abundances of Si and C, although a lower degree of wind ionization or lower mass-loss rates for the SMC stars cannot be ruled out.
Bruhweiler Fred C.
Parsons Sidney B.
Wray James D.
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