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J/PASP/108/338       UBV obs. of the contact binary BF Pavonis (Gonzalez+ 1996)
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Photometric analysis of the contact binary BF Pavonis
     Gonzalez J.F., Lapasset E., Gomez M., Ahumada J.
    <Publ. Astron. Soc. Pac. 108, 338 (1996)>
    =1996PASP..108..338G
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ADC_Keywords: Binaries, eclipsing ; Photometry, UBV

Abstract:
    We present UBV photoelectric observations of the W UMa star BF Pav
    obtained between 1987 and 1993. A time-of-minimum study allows
    detection of a likely period increase of about 0.015s/yr. The
    Wilson-Devinney code is employed to simultaneously model the B and V
    light curves for several fixed values of the mass ratio q. From the
    quality-of-fit of the different solutions an approximate value of
    q=1.4+/-0.2 is derived. Absolute values of masses, dimensions, and
    luminosities are estimated by means of standard mass-luminosity
    relations for main-sequence stars. The detected period variation
    determines a lower limit of 5x10^-7M_{sun}_/yr for the rate of mass
    transfer from the less-massive to the more-massive component. We
    speculate that BF Pav has recently become in contact and is now in a
    rapid phase of mass transfer.

Objects:
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       RA   (2000)   DE    Designation(s)
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    18 45 36     -59 38.7  BF Pav
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File Summary:
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 FileName    Lrecl   Records    Explanations
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ReadMe          80          .   This file
table1v.dat     16       417    Differential V observations of BF Pavonis
table1b.dat     16       808    Differential B observations of BF Pavonis
table1u.dat     16       123    Differential U observations of BF Pavonis
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Byte-by-byte Description of file: table1*.dat
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 Bytes    Format   Units     Label       Explanations
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   1-  9  F9.4     d         HJD-2440000 HJD of observation (-2440000)
  11- 16  F6.3     mag       dMag        Differential (Var-Comp) magnitude
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Origin: AAS CD-ROM series, Volume 6, 1996         Lee Brotzman [ADS] 07-May-1996
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(End)                                                         [CDS]  06-Sep-1996