Abstract

We report results from our photometric survey of high-mass eclipsing binaries. The monitoring campaign was performed with the robotic twin refractor (RoBoTT) at the Universitätssternwarte Bochum in Chile. We discovered six new eclipsing high-mass systems (HD319702, CPD 42 2880, CPD 24 2836, CPD 45 3253, Pismis24 4, GSC08173-00182) and confirm the eclipsing nature of four other high-mass systems (Pismis24 1, CPD 51 8946, CPD 26 2656, TYC8175-685-1). For all objects, we provide the first light curves and determine orbital periods through the Lafler-Kinman algorithm; apart from GSC08173-0018 (P = 19.47 days) all systems have orbital periods between one and seven days. We model the light curves within the framework of the Roche geometry and calculate fundamental parameters for each system component. The Roche lobe analysis indicates that seven systems have a detached geometry while three of them are near-contact systems. The deduced mass ratios q = M_2/M_1 reach from 0.4 to 1.0 with an average value of 0.7 suggesting that these high-mass binaries were created during the star formation process rather than by tidal capture.