J/A+A/397/921 VBLUW photometry of HD 93205 (van Genderen, 2003)
The effect of the apsidal motion on the light curve of
the close binary HD 93205 (O3V+O8V).
van Genderen A.M.
<Astron. Astrophys. 397, 921 (2003)>
=2003A&A...397..921V 2003A&A...397..921V
ADC_Keywords: Stars, double and multiple ; Stars, early-type ; Photometry, VBLUW
Keywords: stars: variable: general - stars: binaries: close -
stars: early-type - stars: individual: HD 93205
Abstract:
The 1982-1985 photometry (VBLUW system) of the O3V+O8V close binary
HD 93205 has been rediscussed because of new insights into its true
nature and orbital changes. By comparing this data set with the one
obtained by Antokhina et al. (2000ApJ...529..463A 2000ApJ...529..463A) in 1993, and using
the same ephemeris to construct the light curve in the phase diagram,
the effect of the apsidal motion became obvious: a phase shift between
the two light curves and a small change of the shape. A phase-locked
light variation in the L passband (containing the higher Balmer
lines) is clearly present in the 1982-1985 data set and is presumably
due to absorption if the O8 star is seen through cooler inter-binary
gas, e.g. the bow-shock between the two colliding winds.
Objects:
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RA (2000) DE Designation(s)
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10 44 33.7 -59 44 15 HD 93205
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 56 39 Journal of brightness and colour indices of
HD 93205 (1982-1985) in the VBLUW system
(in log intensity scale) and the computed
brightness VJ of the UBV system
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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- 11 F11.3 d HJD Heliocentric Julian date
13- 19 F7.4 mag Vwmag Walraven V magnitude
21- 26 F6.4 mag V-B V-B colour index
28- 34 F7.4 mag B-U B-U colour index
36- 42 F7.4 mag U-W U-W colour index
44- 50 F7.4 mag B-L B-L colour index
52- 56 F5.3 mag VJmag Johnson V magnitude
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Acknowledgements: A.M. van Genderen
(End) Patricia Bauer [CDS] 03-Oct-2002