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 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:
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RA (2000) DE Designation(s)
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05 05 03.5 +41 17 19 BF Aur = HD 32419
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File Summary:
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FileName Lrecl Records Explanations
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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
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Byte-by-byte Description of file: b.dat u.dat v.dat b-v.dat u-b.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d HJD Troncated Julian date
16- 21 F6.3 mag Dmag Differential magnitude
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Acknowledgements: Klaus G. Strassmeier
(End) Patricia Bauer [CDS] 05-May-2000