Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988cha%26a..12..216l&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 12, Issue 3, p. 216-222.
Astronomy and Astrophysics
Astrophysics
Scientific paper
New photoelectric observations of DO Cas in B and V were obtained in 1984 with the 35 centimeter reflector of Yunnan Observatory. A total of 583 individual observations in blue, and 590 individual observatirons in yellow were secured during 7 nights.
An extensive search for a reliable mass ratio, q was carried out using the Wilson and Devinney method. Our q value of 0.397 is close to the value of 0.44 publislied by Cester et al. (1977) using Wood's method. Our solutions show that DO Cas is a semidetached system with the more massive primary component filling its Roche lobe. ■olute dimensions were determined by combining Mannino's spectroscopie results with the present photometric results. The radii of the components were found to be considerably larger than the ZAMS radii for the corresonding masses. Change of the period of DO Cas is found to alternate in sign with a period about 25 years. We concluded that DO Cas is a binary in which mass flows from the more massive primary to the secondary.
Liu Qing-Yao
Zhang Yun-Lin
Zhang Zhou-Sheng
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