Independent Component Analysis for the objective classification of globular clusters of the galaxy NGC 5128

We propose that GCs of NGC 5128 consist of two groups. One group originated in the original cluster formation event that coincided with the formation of the elliptical galaxy and the other group emerged from an accreted spiral galaxy. This is unlike the previous result (Chattopadhyay et al., 2009) which accounts for a third group originating from the accretion of tidally stripped dwarf galaxies.