Tracking massive pairs

The analysis of eclipsing binaries with massive components enables to test stellar evolution models and track selected aspects of the structure of early-type stars. Stellar pairs with B-type components may serve to find tighter constraints on the mechanisms of convective core overshooting or masses ofβCephei-type stars. We present the results of an analysis of several eclipsing binaries – N Sco, LS CMa, andδVel – observed by BRITE-Constellation satellites and followed by a wide range of ground-based telescopes.