James J. Wray et al. 2006 ApJ 652 907 doi:10.1086/508600
James J. Wray1, Neta A. Bahcall1, Paul Bode1, Carl Boettiger1 and Philip F. Hopkins2
Show affiliationsWe determine the shape, multiplicity, size, and radial structure of superclusters in the ΛCDM 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 h-1 Mpc. 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.
cosmology: theory; galaxies: clusters: general; large-scale structure of universe
Issue 2 (2006 December 1)
Received 2006 March 2, accepted for publication 2006 August 22
James J. Wray et al. 2006 ApJ 652 907
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