Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...244..157m&link_type=abstract
Astrophysical Journal, Part 1, vol. 244, Feb. 15, 1981, p. 157-168.
Astronomy and Astrophysics
Astrophysics
56
Absorption Spectra, Eclipsing Binary Stars, Hot Stars, Stellar Mass, Stellar Spectra, Stellar Spectrophotometry, Wolf-Rayet Stars, Eccentricity, Emission Spectra, Line Spectra, O Stars, Orbital Elements, Stellar Luminosity, Stellar Motions
Scientific paper
Two W-R binaries are reexamined using coude spectroscopy. The new orbit solution for HD 186943 suggests that the minimum mass of the WN4 star is 9-11 solar masses. The companion appears to be approximately of the type O9 V and is about 1.3 mag brighter than the WN4 star. The minimum mass for the O star indicates that the system should eclipse. Analyzing current data and previous studies, it is shown that HD 211853 is actually a quadruple system that consists of a widely spaced pair of close binaries of types WN6 plus O and O plus O.
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