Determination of Masses and Radii of the Massive Eclipsing Binary System HV 2543 in the Large Magellanic Cloud

Details Determination of Masses and Radii of the Massive Eclipsing Binary System HV 2543 in the Large Magellanic Cloud Determination of Masses and Radii of the Massive Eclipsing Binary System HV 2543 in the Large Magellanic Cloud

2000-03-08

arxiv.org/abs/astro-ph/0003118v1

Astronomy and Astrophysics

Astrophysics

8 pages, 4 postscript figures, accepted for publication in A&A

Scientific paper

We present a V light curve of the eclipsing binary system HV 2543 (Sk-67 117) in the Large Magellanic Cloud based on CCD images acquired between the years 1995 and 1998. We have analysed this light curve and published radial velocity data, finding that this system is semidetached, with the secondary (less massive and less luminous component) filling its Roche lobe. From our analysis with the Wilson-Devinney code, we estimated the following masses and radii for the components of HV 2543: M1=25.63 +- 0.7, R1=15.54 +- 0.4, M2=15.63 +- 1.0 and R2=13.99 +- 0.4, in solar units. On the basis of B and V photometry of the field stars, we found that HV 2543 is member of an OB association, perhaps related to which the massive binary system Sk-67 105 belongs.

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