Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...251..230g&link_type=abstract
Astrophysical Journal, Part 1, vol. 251, Dec. 1, 1981, p. 230-245.
Astronomy and Astrophysics
Astrophysics
46
Binary Stars, Elliptical Orbits, Light Curve, Stellar Models, Stellar Winds, X Ray Sources, Apsides, Companion Stars, Orbit Calculation, Stellar Evolution, Variable Stars
Scientific paper
The 4.8 hour X-ray light curve of Cygnus X-3 is quantitatively described by several proposed models under the assumption that the binary orbit of Cyg X-3 is elliptic. The cocoon model implies an apparent size for the X-ray star's companion, which is larger than that of its critical lobe, and it is suggested that the emission of a dense stellar wind by the companion could lead to such a situation. It is shown that a helium star, with or without a hydrogen-rich envelope, seems to be the most likely Cyg X-3 companion, and that some of the observed variations in the 4.8 hour period can be accounted for by the apparent period variations due to apsidal motion.
Elsner Ronald F.
Ghosh Partha Pratim
Sutherland Peter G.
Weisskopf Martin C.
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