EDP Sciences
Free access
Volume 437, Number 2, July II 2005
Page(s) 769 - 774
Section Instruments, observational techniques, and data processing
DOI http://dx.doi.org/10.1051/0004-6361:20042448

A&A 437, 769-774 (2005)
DOI: 10.1051/0004-6361:20042448

Photometric study of the eclipsing binary V1034 Sco

M. Y. Bouzid1, C. Sterken1 and T. Pribulla2

1  Astronomy Group, Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium
    e-mail: [ybouzid;csterken]@vub.ac.be
2  Astronomical Institute of the Slovak Academy of Sciences, 05960 Tatranská Lomnica, The Slovak Republic
    e-mail: pribulla@ta3.sk

(Received 29 November 2004 / Accepted 14 March 2005)

We present multi-colour Strömgren photometry of the eclipsing binary V1034 Sco in the galactic open cluster NGC 6231, providing for the first time a full coverage of the orbital period (P = 2.44 days) and a complete analysis of the orbit. This extensive new photometry was analyzed together with multiband spectroscopy and results in an improved ephemeris, photometric elements and absolute parameters of the components. The system is close, but clearly detached. The masses of the components $M_1 = 16.8 \pm0.5~M_\odot$ and $M_2 = 9.4\pm 0.3~M_\odot$ do not correspond to the published spectral classification (O9III + B1III). The parameters of the components are consistent with the main-sequence luminosity class. We independently derive a distance modulus $V_0 - M_V = 10.73 \pm0.02$.

Key words: instrumentation: photometers -- binaries: eclipsing -- methods: data analysis -- methods: observational -- techniques: photometric -- Hertzspring-Russell and C-M diagrams

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