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J/A+A/362/673       BF Aur UBV photometry                   (Kallrath+, 2000)

The BF Aurigae system. A close binary at the onset of mass transfer. Kallrath J., Strassmeier K.G. <Astron. Astrophys. 362, 673 (2000)> =2000A&A...362..673K
ADC_Keywords: Binaries, eclipsing ; Photometry, uvby Keywords: stars: individual: BF Aur - stars: binaries: eclipsing - stars: early-type - stars: binaries: close - stars: evolution Abstract: Because the question of the mass ratio of the early-type system BF Aur has not yet fully been clarified, we present and analyse new UBV photometry and nearly contemporaneous radial velocity observations. From a simultaneous least squares analysis of the photometric light curves and the new radial velocity curves we derive a mass ratio of q=1.048±0.02. With even much more accurate photometric and spectroscopic data the mass ratio remains weakly defined. The resulting stellar parameters are consistent with the line ratios derived from old and our new spectra and available Stroemgren indices. We confirm earlier conclusions that BF Aur is detached and that the more massive component is almost filling its Roche lobe. New data indicating a period change support the interpretation that mass exchange has already started or is about to start. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 05 05 03.5 +41 17 19 BF Aur = HD 32419 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file b.dat 21 342 Johnson B photometry HJD vs. delta B u.dat 21 387 Johnson U photometry HJD vs. delta U v.dat 21 320 Johnson V photometry HJD vs. delta V b-v.dat 21 290 Johnson B-V photometry HJD vs. delta B-V u-b.dat 21 307 Johnson U-B photometry HJD vs. delta U-B
Byte-by-byte Description of file: b.dat u.dat v.dat b-v.dat u-b.dat
Bytes Format Units Label Explanations
1- 14 F14.6 d HJD Troncated Julian date 16- 21 F6.3 mag Dmag Differential magnitude
Acknowledgements: Klaus G. Strassmeier
(End) Patricia Bauer [CDS] 05-May-2000
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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