Hard X-rays emitted by starbursts as predicted by population synthesis models including a realistic fraction of interacting binaries

We combine our close binary population number synthesis code with the formation mechanism of X-radiation in young supernova remnants and in high mass X-ray binaries, to predict the hard X-ray luminosity emitted by starbursts. We demonstrate that the impact of interacting binaries is substantial. Therefore, observations of hard X-rays with energies larger than 2 keV of starburst regions may highlight the importance of close binary evolution in understanding properties of active starformation regions.