Population synthesis for the luminosity functions of X-ray binaries made using the “Scenario Machine”

Using the “Scenario Machine” (a computer code based on the Monte-Carlo method, developed to calculate the evolution of a large ensemble of binaries), we have carried out population-synthesis calculations for X-ray binaries for the purpose of modeling the X-ray luminosity functions in various type galaxies. These calculations were focused on the evolution of magnetized neutron stars. The X-ray luminosity function is not universal, and depends on the star formation rate in the galaxy. In theoretical models, it is very important to take into account the evolution of the binaries and their lifetimes in their X-ray stages. We calculated the cumulative and differential X-ray luminosity functions in galaxies with a constant star formation rate, the cumulative luminosity functions for various time intervals since the peak star formation, and curves describing the evolution of the X-ray luminosity after a star formation burst in the galaxy.