GALAXY SIMULATIONS OF VISUAL BINARY STARS

摘要

The simulated binary star catalogue that represents the full sky distribution of stars down to m_G = 20 mag is constructed. The catalogue is based on the Galaxy model and the fundamental physical parameter distributions of the stars and binaries. Instead of using observed luminosity functions, we use stellar and binary evolution routines to simulate stellar and binary evolution in different Galaxy populations and to calculate the physical properties of the stars in a given galactic direction. The model has been extensively tested so that the number and the colour distributions of the stars agree well with the observations. The simulated catalogue is analyzed for observational properties of binary stars considering the observational capabilities of Gaia in eight different galactic samples. Detailed predictions for different types of visual binaries are given.