The dynamics of mass segregation in star clusters

Priya Hasan*and S. N. Hasan
Department of Astronomy, Osmania University, Hyderabad 500 007, India

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Abstract

In this paper, using 2MASS photometry, we study the mass functions Φ(M) = dN/dM ∝ M -(1+Â) of a sample of nine clusters of ages varying from 6 Myr to 1.2 Gyr and galactocentric distances from 6 - 12 kpc. We look for evidence of mass segregation in these clusters and trace the variation in the value of X in different regions of the cluster as a function of the parameter Τ = tage=trelax, galactocentric distances, age and size of the cluster.



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Keywords : star clusters: parameters - IMF{mass segregation - 2MASS