J/PASP/108/338 UBV obs. of the contact binary BF Pavonis (Gonzalez+ 1996)
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 1996PASP..108..338G
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☉/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
(End) [CDS] 06-Sep-1996