Abstract
The subclustering within the Local Group is studied by means of the recently developed treediagram technique, enabling one to establish substructures of different boundness. Thirty-two galaxies from 39 listed are shown to form an interacting system which includes Milky Way and M31 giant spirals; we define the Local Group as that interacting system only. Second-level boundness indicates two clear subsystems, influenced by Milky Way and that of M31. The search of systems bound stronger, specifies several pair galaxies of similar morphology.
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Gurzadyan, V.G., Kocharyan, A.A. & Petrosian, A.R. The substructure of the local group. Astrophys Space Sci 201, 243–248 (1993). https://doi.org/10.1007/BF00627197
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DOI: https://doi.org/10.1007/BF00627197