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Séminaire du Jeudi 28 Juin 2012

Fragmentation of Molecular clouds and Initial Mass Function (IMF)

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.


Sous la tutelle de:

tutelles

Sous la tutelle de:

CNRS Université Grenoble Alpes