J/A+A/495/231 Multiwavelength study of Cyg OB2 5 (Linder+, 2009)
A multiwavelength investigation of the massive eclipsing binary Cyg OB2 #5.
Linder N., Rauw G., Manfroid J., Damerdji Y., De Becker M., Eenens P.,
Royer P., Vreux J.-M.
<Astron. Astrophys. 495, 231 (2009)>
=2009A&A...495..231L 2009A&A...495..231L
ADC_Keywords: Binaries, eclipsing ; Photometry, CCD
Keywords: stars: binaries: close - stars: binaries: eclipsing -
stars: early-type - stars: distances - stars: winds, outflows
Abstract:
The properties of the early-type binary Cyg OB2 #5 have been debated
for many years and spectroscopic and photometric investigations
yielded conflicting results. We have attempted to constrain the
physical properties of the binary by collecting new optical and X-ray
observations. The optical light curves obtained with narrow-band
continuum and line-bearing filters are analysed and compared. Optical
spectra are used to map the location of the He II 4686 and H-alpha
line-emission regions in velocity space. New XMM-Newton as well as
archive X-ray spectra are analysed to search for variability and
constrain the properties of the hot plasma in this system.
Description:
Photometric time series in different narrow-band filters are given for
the eclipsing binary systems Cyg OB2 #5 = V729 Cyg = BD+40 4220. The
data were obtained with the CCD camera at the 1.2m telescope at the
Observatoire de Haute Provence.
Objects:
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RA (2000) DE Designation(s)
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20 32 22.4 +41 18 19 Cyg OB2 #5 = V* V729 Cyg
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 32 1282 Photometric time series of Cyg OB2 #5
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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- 4 A4 --- Filter Filter Name (c1, c2, HeII, CIV, HeI) (1)
6- 17 F12.4 d HJD Heliocentric Julian Day
19- 25 F7.4 mag mag Magnitude in Filter
27- 32 F6.4 mag e_mag Uncertainty on the magnitude
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Note (1): Narrow-band filters designed for the study of WR stars
(Royer et al. 1998A&AS..130..407R 1998A&AS..130..407R). The central wavelength are
in Å(0.1nm): c1=5057 c2=6051 HeII=4686 CIV=5801-5812, HeI=5876.
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Acknowledgements:
Gregor Rauw, rauw(at)astro.ulg.ac.be
(End) Gregor Rauw [IAGL, Belgium], Patricia Vannier [CDS] 19-Dec-2008