Mass to Luminosity Ratios of Some Clusters in the Large Magellanic Cloud

Abstract

Luminosity profiles and dynamical parameters of 12 globular clusters in the Large Magellanic Cloud (SB(s)m) are obtained from the concentric aperture photoelectric photometry of 3 different aged clusters and the collected photometric data of 9 clusters. The total masses of the globular clusters are the calculated using the equation M⨀ = Mrtj(4Q^2-k^2), which is derived from the theoretical rotation curve for the exponential disk (Chun 1987). These masses lie between 0.3 x 10^4 and 15.8 x 10^4 M⨀ . From the determined total mass and luminosity ratios are also derived. The M/L ratio of a cluster increases with the cluster age; about 0.03 for the youngest clusters (SWB I) and about 0.24 for the oldest clusters (SUB VII). There is a difference in M/L by a factor of 10 between the galactic globular clusters and the old globular clusters in the LCM.