Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982acaps...2..144l&link_type=abstract
(Acta Astrophysica Sinica, vol. 2, 1982, p. 144-151.) Chinese Astronomy and Astrophysics, vol. 6, Sept. 1982, p. 199-204. Trans
Astronomy and Astrophysics
Astrophysics
4
Binary Stars, Light Curve, Stellar Evolution, Stellar Mass Ejection, Stellar Spectrophotometry, Electrophotometry, Roche Limit, Stellar Gravitation, Stellar Luminosity, Stellar Temperature
Scientific paper
A total of 90 normal points of a light curve obtained from yellow light observations of RZ Dra were analyzed using the method of Wilson and Devinney (1971, 1973). A preliminary solution was determined photometrically by approximation of the mean light curve, followed by a final solution using differential corrections to the approximation. RZ Dra was found to be a semi-detached system with the less massive component filling the Roche surface. The dimensions of the system comprised 0.61 solar mass for one star, 0.41 solar mass for the companion, a 1.15 solar radius for the first star, and a 0.96 solar radius for the other. A discussion of the evolutionary stage is presented, and the observed variation in the brightness of the primary minimum is explored. A mass loss for the smaller star is suggested as the cause of a long term decrease in its period.
Huang Yi-Long
Leung Ka Chun
Zhai Di-Sheng
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