The orientations of galaxy groups and formation of the Local Supercluster

Abstract

We analysed the orientation of galaxy groups in the Local Supercluster (LSC). It is strongly correlated with the distribution of neighbouring groups in the scale till about 20 Mpc. The group major axis is in alignment with both the line joining the two brightest galaxies and the direction toward the centre of the LSC, i.e. Virgo cluster. These correlations suggest that two brightest galaxies were formed in filaments of matter directed towards the protosupercluster centre. Afterwards, the hierarchical clustering leads to aggregation of galaxies around these two galaxies. The groups are formed on the same or similarly oriented filaments. This picture is in agreement with the predictions of numerical simulations.

14 pages, 4figures, 4 tables, APJ accepted

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• Remarks on the methods of investigations of alignment of galaxies
• Origin and Evolution of Structure and Nucleosynthesis for Galaxies in the Local Group
• The distribution of galaxies gravitational field stemming from their tidal interaction
• Modeling the Alignment Profile of Satellite Galaxies in Clusters
• Orientation of galaxies in structures
• Some properties of galaxy structures