Other
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224..565l&link_type=abstract
Astrophysical Journal, Part 1, vol. 224, Sept. 1, 1978, p. 565-569. Research supported by the University of Nebraska.
Other
29
Eclipsing Binary Stars, Light Curve, O Stars, Stellar Spectrophotometry, Cygnus Constellation, Electrophotometers, Stellar Luminosity, Stellar Mass, Stellar Models
Scientific paper
The photoelectric observations of V729 Cyg by Miczaika (1953) and Hall (1974) were analyzed using the Wilson and Devinney (1971) approach. A photometric solution was obtained by adopting the spectroscopic mass ratio of Bohannan and Conti (1976). V729 Cyg is found to be an evolved contact system. Its period of 6.6 days is by far the longest of any known contact system. The primary has a mass of about 60 solar masses and is one of the most massive stars known. This solution, like all solutions for close O-type systems, has an inconsistency. The model predicts that the primary is eight times more luminous than the secondary, while spectroscopic evidence indicates comparable luminosities. Other alternatives and their problems are also discussed. It is suggested that an investigation of the nature of secondary spectra may be essential for an understanding of close early-type binaries
Leung Ka Chun
Schneider David P.
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