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Absolute properties of BG Ind - a bright F3 system just leaving the Main Sequence

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arxiv 1010.1355 v2 pith:FSNAVQGI submitted 2010-10-07 astro-ph.SR

M. Rozyczka , J. Kaluzny , W. Pych , M. Konacki , K. Malek , L. Mankiewicz , M. Sokolowski , A.F. Zarnecki (for the Pi of the Sky collaboration) This is my paper · ORCID
classification astro-ph.SR
keywords brightjustmsunprimaryabsoluteadvancedanalysisbeyond
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We present photometric and spectroscopic analysis of the bright detached eclipsing binary BG Ind. The masses of the components are found to be 1.428 +- 0.008 and 1.293 +- 0.008 Msun and the radii to be 2.290+-0.017 and 1.680+-0.038 Rsun for primary and secondary stars, respectively. Spectra- and isochrone-fitting coupled with color indices calibration yield [Fe/H]=-0.2+-0.1. At an age of 2.65+-0.20 Gyr BG Ind is well advanced in the main-sequence evolutionary phase - in fact, its primary is at TAMS or just beyond it. Together with three similar systems (BK Peg, BW Aqr and GX Gem) it offers an interesting opportunity to test the theoretical description of overshooting in the critical mass range 1.2-1.5 Msun.

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