The shape, multiplicity, and evolution of superclusters in ACDM cosmology

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

doi:10.1086/508600

The shape, multiplicity, and evolution of superclusters in ACDM cosmology

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

Astrophysical Sciences

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Abstract

We determine the shape, multiplicity, size, and radial structure of superclusters in the ACDM 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 (∼A^-2) and steepens on larger scales. These results can be used as a new test of the current cosmology when compared with up-coming observations of large-scale surveys.

Original language	English (US)
Pages (from-to)	907-916
Number of pages	10
Journal	Astrophysical Journal
Volume	652
Issue number	2 I
DOIs	https://doi.org/10.1086/508600
State	Published - Dec 1 2006

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmology: theory
Galaxies: clusters: general
Large-scale structure of universe

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10.1086/508600

Cite this

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title = "The shape, multiplicity, and evolution of superclusters in ACDM cosmology",

abstract = "We determine the shape, multiplicity, size, and radial structure of superclusters in the ACDM 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 (∼A-2) and steepens on larger scales. These results can be used as a new test of the current cosmology when compared with up-coming observations of large-scale surveys.",

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T1 - The shape, multiplicity, and evolution of superclusters in ACDM cosmology

AU - Wray, James J.

AU - Bahcall, Neta A.

AU - Bode, Paul

AU - Boettiger, Carl

AU - Hopkins, Philip F.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - We determine the shape, multiplicity, size, and radial structure of superclusters in the ACDM 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 (∼A-2) and steepens on larger scales. These results can be used as a new test of the current cosmology when compared with up-coming observations of large-scale surveys.

AB - We determine the shape, multiplicity, size, and radial structure of superclusters in the ACDM 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 (∼A-2) and steepens on larger scales. These results can be used as a new test of the current cosmology when compared with up-coming observations of large-scale surveys.

KW - Cosmology: theory

KW - Galaxies: clusters: general

KW - Large-scale structure of universe

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JO - Astrophysical Journal

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IS - 2 I

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The shape, multiplicity, and evolution of superclusters in ACDM cosmology

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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