Mass distribution of young stars

A catalog of 26 young binary stars and 10 stars with protoplanetary disks with well determined masses is compiled. It contains Ae/Be Herbig stars, T Tauri stars and red dwarfs. We constructed the mass distribution of young stars and approximated it with the power law $dN{\sim}M^{-\gamma}dM$. The slope of the mass distribution is ${\gamma}=2.15{\pm}0.30$ for stars in a mass range of $1.0M_{\odot}<M<6.3M_{\odot}$, which is close to the Salpeter mass function. The slope is ${\gamma}=0.12{\pm}0.15$ in a mass range $0.1M_{\odot}<M<1.0M_{\odot}$. Over the entire mass interval, the mass distribution of young stars may be approximated with a lognormal law, which the most probable mass $M_{\rm prob}=(0.86\pm0.08)M_{\odot}$.