Tanuka Chattopadhyay (Calcutta University)
Jeudi 28 Juin - 11 h 00
Salle Manuel Forestini - IPAG
Stellar Initial Mass Function (IMF) is an important aspect for delineating a clear picture of star formation scenario in a broad spectrum of environments — from star clusters, associations, field stars to much bigger ones like dwarf galaxies, giant galaxies, cluster of galaxies etc. A stochastic model has been developed for the hierarchical fragmentation of a molecular cloud. Here, the number of fragments, time between successive fragmentation steps, and mass of a fragment are considered as random variables, and fragment masses are generated using the Metropolis–Hastings algorithm. The resulting mass spectra, computed at different projected distances and taking opacity into consideration, show a signature of mass segregation. The critical mass, mass spectrum, and mass segregation are consistent with the observations of young massive clusters in our Galaxy as well as in external galaxies.
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