Holes in the distribution of rich clusters of galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Models, Galactic Clusters, Universe, Data Bases, Red Shift, Spatial Distribution, Statistical Analysis, Topology, Voids

Scientific paper

The properties of voids in the distribution of Abell clusters of galaxies are described. Cluster voids, such as that in Bootes, serve as markers of large candidate voids of galaxies. The advantages and disadvantages of using rich clusters as tracers of large-scale structures are reviewed. One new 40/h Mpc diameter void of galaxies and clusters in Pisces-Cetus is described in detail. It is found that numerical simulations of models with Gaussian initial conditions do not reproduce the void or filament structures observed within the Abell cluster catalog. The implications of this discrepancy for future observations and models are discussed.

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