Wolf-Rayet stars in the Magellanic Clouds. III - The WO4+O4 V binary SK 188 in the SMC

Details Wolf-Rayet stars in the Magellanic Clouds. III - The WO4+O4 V binary SK 188 in the SMC Wolf-Rayet stars in the Magellanic Clouds. III - The WO4+O4 V binary SK 188 in the SMC

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...292..511m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 292, May 15, 1985, p. 511-516. Research supported by the Alexander von Humb

Astronomy and Astrophysics

Astrophysics

20

Binary Stars, Magellanic Clouds, Stellar Evolution, Wolf-Rayet Stars, Astronomical Spectroscopy, Radial Velocity, Stellar Mass Ejection, Stellar Spectra

Scientific paper

Spectroscopic observations and radial velocities of the WO4+O4 V binary Sk 188 in the SMC are reported. Emission and antiphased absorption line orbits show that this massive system contains a Wolf-Rayet (W-R) star with relatively low mass ratio of roughly 0.27. It is interpreted to be the most evolved W-R star known in a close, massive binary and fits the scenario of Barlow and Hummer that oxygen-rich WO stars are in a late WC stage as a result of advanced nuclear burning.

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