The WN4 + O4-6 Wolf-Rayet binary HD 90657

Details The WN4 + O4-6 Wolf-Rayet binary HD 90657 The WN4 + O4-6 Wolf-Rayet binary HD 90657

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...259..213n&link_type=abstract

Astrophysical Journal, Part 1, vol. 259, Aug. 1, 1982, p. 213-218. Research supported by the Natural Sciences and Engineering R

Astronomy and Astrophysics

Astrophysics

28

Binary Stars, Early Stars, Light Curve, Orbital Elements, Wolf-Rayet Stars, Electrophotometers, Radial Velocity, Stellar Mass, Stellar Spectrophotometry

Scientific paper

HD 90657 is shown to be a WN4 + O4-6 binary, much like the WN4 + O9 binary HD 186943 with mass ratio M(W-R)/M(O) approximately equal to 0.52. The best W-R orbit is derived from the emission lines of highest excitation, which show the least phase shift relative to the (reliable) absorption-line orbit due to the O component. Light curve variations restrain the masses to a range of about 11-14 solar masses for the WN4 component, and 21-28 solar masses for the O-type component

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