The Physical Reality Of McConnachie compact groups of galaxies -1. - .

In this paper the tree clustering technique (The Astrophysical Euclidean Separation Coefficients) is used to test the reality of compact groups of galaxies in McConnachie et al. (2009) catalog. The method applied on the first 100 groups only. The result will reveal the membership of each galaxy and how it relates to its group. The tables of groups and their members are included. -See more at: .