The existence of substructure in the central region of the Coma Cluster is shown by the use of a new statistical method based on maximum likelihood. This method enables the galaxies to be split into two groups on the basis of their positions and line-of-sight velocities. Dynamical models of the system are constructed and discussed. This analysis shows that the galaxies in the central region of the Coma Cluster have not yet relaxed to an equilibrium distribution.
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Fitchett et al. (1987) studied this question.