Mass distribution function at the time of star formation

Dr. Ram Sagar
Aryabhatta Research Institute of Observational Sciences (ARIES)

Shape of the initial mass function (MF) has been derived from photometric  observations of young (age < 1 Myr) star clusters located in our galaxy, the Magellanic Clouds and the nearby local group of galaxies. Its study indicates that there is no obvious dependence of the MF slope on either location in the galaxy or age of the young star clusters.  The MF slope above one solar mass appears to be independent of the spatial concentration of the star formed as well as galactic characteristics including metallicity. Star formation processes may be responsible for the mass segregation observed in a number of young star clusters of our galaxy and the Magellanic Clouds as their ages are much smaller than their dynamical evolution time. Astrophysical implications of these results shall be discussed in the presentation.