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J/A+AS/125/475      DD Mon BV light curves (Qian+ 1997)
Photometric study of the close binary system DD Monocerotis
       Qian S., Liu Q., Yang Y., Gu S., Huang Z.
      <Astron. Astrophys. Suppl. Ser. 125, 475 (1997)>
      =1997A&AS..125..475Q      (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry

Keywords: stars: DD Mon - binaries: eclipsing - stars: fundamental parameters


Abstract:
    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.
Objects:
    ----------------------------------------------------------
       RA  (2000)  DE    Designation(s)
    ----------------------------------------------------------
    06 45 57   -00 16.9  DD Mon = HD 292319
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1            18      402   V observations of DD Mon
table2            18      358   B observations of DD Mon
fig1.ps           82    60024   B and V light curves of DD Mon
tables.tex        76      202   LaTeX version of the tables


Byte-by-byte Description of file: table1 table2

   Bytes Format Units   Label     Explanations

   1- 11  F11.4 d       HJD       Heliocentric Julina date
  13- 17  F5.3  mag     DMag      Differential V or B magnitude (1)

Note (1): Differential magnitude between these observations and those
           obtained in 1986 by Yamasaki et al. (1990AJ.....99.1218Y)
          V magnitude in table1, B magnitude in table2


Acknowledgements: Yulan Yang 

(End)                                         Patricia Bauer [CDS]   11-Apr-1997