Atmospheric eclipse effects in Wolf-Rayet binaries in the Small Magellanic Cloud

Astronomy and Astrophysics – Astronomy

Scientific paper

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Eclipsing Binary Stars, Iue, Magellanic Clouds, Spaceborne Astronomy, Ultraviolet Astronomy, Ultraviolet Spectra, Metallicity, Stellar Atmospheres

Scientific paper

Results of IUE observations of three SMC W-R binary systems are presented. Selective atmospheric eclipse effects are evident in HD5980 (WN4+06I) and Sk 188 (W04+04V), and are very weak, or absent in Sk 108 (WN3+06I). The difference in heavy-metal content between the SMC and Galactic objects is clearly manifest in the lack of atmospheric eclipse effects in the wavelength range 1360 to 1470 A in HD5980 and Sk 188.

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