New BV light curves of the short-period eclipsing binary system DD Mon have been obtained. Light-curve variability is seen in both B and V bands as compared with the light curves obtained in 1986 by Yamasaki et al. (1990). The light curves are analyzed by using Wilson-Devinney's synthetic light-curve program, and the present photometric solution reveals that DD Mon is a near-contact binary with the secondary component filling the Roche lobe. Combined with Yamasaki et al.'s (1990) spectroscopic results, absolute quantities of DD Mon are derived: mass of the primary M-1 = 1.05+/-0.08 M., mass of the secondary M-2 = 0.47+/-0.04 M., radius of the primary R-1 = 1.36+/-0.04 R., radius of the secondary R-2 = 1.03 +/- 0.03 R.. These results show that the components of DD Mon have evolved away from the ZAMS and through a mass-transfer process to the present semi-detached state. The variation in shape of the light curve may be caused by the evolution of the system and the activity of dark spots.
Qian SB,Liu QY,Yang YL,et al. Photometric study of the close binary system DD Monocerotis[J]. ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES,1997,125(3):475-478.
APA
钱声帮,刘清耀,杨毓兰,顾盛宏,黄占奎,&Qian, SB.(1997).Photometric study of the close binary system DD Monocerotis.ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES,125(3),475-478.
MLA
钱声帮,et al."Photometric study of the close binary system DD Monocerotis".ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES 125.3(1997):475-478.
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