Query : 1997A&AS..125..475Q

1997A&AS..125..475Q - Astron. Astrophys., Suppl. Ser., 125, 475-478 (1997/November-1)

Photometric study of the close binary system DD Monocerotis.


Abstract (from CDS):

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. (1990AJ.....99.1218Y). 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 (1990AJ.....99.1218Y) spectroscopic results, absolute quantities of DD Mon are derived: mass of the primary M1=1.05±0.08M, mass of the secondary M2=0.47±0.04M, radius of the primary R1=1.36±0.04R, radius of the secondary R2=1.03±0.03R. 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.

Abstract Copyright:

Journal keyword(s): stars: individual: DD Mon - binaries: eclipsing - stars: fundamental parameters

VizieR on-line data: <Available at CDS (J/A+AS/125/475): fig1.ps table1 table2 tables.tex>

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 HD 48867 * 06 45 29.0260225152 -00 28 01.645817556   9.40 9.16     A8III 13 0
2 HD 292321 * 06 45 34.8919862496 -00 25 35.797395684   10.30 10.08     F0 6 0
3 V* DD Mon EB* 06 45 57.8383393056 -00 17 31.852613076   11.24 10.69     F6V 48 0

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