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The Shape, Multiplicity, and Evolution of Superclusters in LambdaCDM Cosmology

James J. Wray·Neta A. Bahcall·Paul Bode·Carl Boettiger·Philip F. Hopkins
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Abstract

We determine the shape, multiplicity, size, and radial structure of superclusters in the LambdaCDM concordance cosmology from z = 0 to z = 2. Superclusters are defined as clusters of clusters in our large-scale cosmological simulation. We find that superclusters are triaxial in shape; many have flattened since early times to become nearly two-dimensional structures at present, with a small fraction of filamentary systems. The size and multiplicity functions are presented at different redshifts. Supercluster sizes extend to scales of ~ 100 - 200 Mpc/h. The supercluster multiplicity (richness) increases linearly with supercluster size. The density profile in superclusters is approximately isothermal (~ R^{-2}) and steepens on larger scales. These results can be used as a new test of the current cosmology when compared with upcoming observations of large-scale surveys.

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James J. Wray, Neta A. Bahcall, Paul Bode, Carl Boettiger, Philip F. Hopkins. 2007-01-30. The Shape, Multiplicity, and Evolution of Superclusters in LambdaCDM Cosmology. https://doi.org/10.1086/508600

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