Abstract
The relation between the mean separationd of clusters of galaxies and their mean richnessN is found to be well represented byd=3.4N 2/3. Both this observed result and the Bahcall-Soneira relation(that is, the spatial correlations of clusters of galaxies are increased with their richness) are well explained by the cosmic string picture, lending support to the cosmic-string theory.
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Jing, YP., Zhang, JL. Cosmic strings and the formation of clusters of galaxies. Astrophys Space Sci 138, 105–112 (1987). https://doi.org/10.1007/BF00642868
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DOI: https://doi.org/10.1007/BF00642868