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

Understand

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.