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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
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: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 18 45 36 -59 38.7 BF Pav ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
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
Byte-by-byte Description of file: table1?.dat
Bytes Format Units Label Explanations
1- 9 F9.4 d HJD-2440000 HJD of observation (-2440000) 11- 16 F6.3 mag dMag Differential (Var-Comp) magnitude
Origin: AAS CD-ROM series, Volume 6, 1996 Lee Brotzman [ADS] 07-May-1996
(End) [CDS] 06-Sep-1996
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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