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Mikulasek","submitted_at":"2019-06-05T10:04:42Z","abstract_excerpt":"The early-type massive binary MQ Cen (P$_{orb}$=3.7 d) has been investigated by means of high-resolution ($R\\sim48\\,000$) spectral analysis and multi-band (Johnson $BVRI$ and Str\\\"{o}mgren $vby$) light curve modeling. The physical parameters of the components have been found to be $M_1= 4.26\\pm0.10$ M$_{\\odot}$, $R_1= 3.72\\pm0.05 $R$_{\\odot}$, $T_{\\rm eff1}=16\\,600\\pm520$ K, and $M_2= 5.14\\pm0.09 $M$_{\\odot}$, $R_2= 7.32\\pm0.03 $R$_{\\odot}$, $T_{\\rm eff2}=15\\,000\\pm500$ K for the primary and secondary, respectively. The orbital inclination is $i=87.0\\pm0.2$ deg. 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