Galaxy clusters moving towards an unseen attractor
Galaxy clusters around the “Void”
Outside the outer ring (contains void) one finds many galaxy clusters like Abell clusters forming Bootes supercluster, Corona Borealis supercluster, Hercules supercluster, Draco-
brightest among them all because it is the most nearby cluster among the ones mentioned above. The clusters are mainly filled with spiral galaxies similar to the lonely galaxies seen inside the “void”.
Virgo, Centaurus, Shapley clusters and motions of galaxies towards “Great Attractor”
Our Milky way galaxy is moving towards Virgo cluster, while Virgo cluster is following Centaurus and Shapley clusters towards a greater structure known as the “Great Attractor”. Virgo is our nearest cluster. It makes one end of a long chain joined by Centaurus supercluster and Shapley supercluster on the other end which are richer and bigger in their galaxy contents.
Three clusters of galaxies in the central part of the Shapley supercluster are more rich in galaxy content than the very rich Coma cluster. The central area of the Shapley supercluster which contains many clusters of galaxies are shown in the figure 13. The sky dips towards the South Galactic hemisphere as it crosses the Milky way arm separating the North and the South Galatic regions. The gas and dust in the Milky way arm makes it difficult to see the region immediately beyond the Shapley supercluster where the “Great Attractor” is believed to exist.
A multiwavelength survey of the central clusters of Shapley supercluster by VST(VLT Survey telescope is shown in figure 14.
Abell cluster 1795 in Bootes
Coma cluster
Motions from Virgo to Shapley and beyond
Figure 13
Figure 14
Figure 15. Galaxies in Abell 3558
