Distribution of galaxies in the A2142 supercluster in the sky plane in global density regions as described in the text. Red filled circles denote galaxies in the region of global density D8 ≥ 17; yellow empty circles correspond to galaxies with global density 13 ≤ D8 < 17. Blue crosses correspond to galaxies with global density 8 ≤ D8 < 13, and grey Xs galaxies with 5 ≤ D8 < 8. The size of the highest density region is approximately 1.8 degrees, and the size of the region with D8 ≥ 13 is approximately 3 degrees; sizes in megaparsecs are given in Table 2. Number 1 marks the Abell cluster A2142, and numbers 2 and 3 indicate two regions of galaxy groups in the tail of the supercluster, as explained in the text.
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