Galaxy Clusters in the Hubble Volume Simulations

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dc.creatorColberg, Joerg M.
dc.creatorWhite, Simon D. M.
dc.creatorMacFarland, Thomas J.
dc.creatorJenkins, Adrian
dc.creatorFrenk, Carlos S.
dc.creatorPearce, F. R.
dc.creatorEvrard, August E.
dc.creatorCouchman, H. M. P.
dc.creatorEfstathiou, George
dc.creatorPeacock, John A.
dc.creatorThomas, Peter A.
dc.date1998-08-24
dc.date.accessioned2026-07-07T02:27:43Z
dc.date.available2026-07-07T02:27:43Z
dc.descriptionWe report on analyses of cluster samples obtained from the Hubble Volume Simulations. These simulations, an $Ω=1$ model named $τ$CDM and a flat low $Ω$ model with a cosmological constant ($Λ$CDM), comprise the largest computational efforts to date in numerical cosmology. We investigate the presence of massive galaxy clusters at $z\approx 0.8$. The $τ$CDM model fails to form clusters at such a redshift. However, due to the small number of observed clusters around $z\approx 0.8$ and the uncertainties in the determinations of their masses, this conclusion still is somewhat preliminary. We produce cluster catalogs at $z=0$ for both cosmologies and investigate their two--point correlation function $ξ$. We show that the relationship between the mean density of subsamples of clusters, expressed via their mean separation $d_{\rm c}$, and the correlation length $r_0$, defined through $ξ(r_0) = 1$, is not linear but turns over gently for large $d_{\rm c}$. An analytic prediction by Mo & White (1996) overpredicts $r_0$. The results from the analysis of the APM cluster data by Croft et al. (1997) are nicely matched by the $Λ$CDM model.
dc.descriptionLaTex: 4 pages, 1 figure, includes conf_iap.sty style file. To appear in proceedings of The 14th IAP Colloquium: Wide Field Surveys in Cosmology, held in Paris, 1998 May 26-30, eds. S.Colombi, Y.Mellier
dc.identifierhttps://arxiv.org/abs/astro-ph/9808257
dc.identifierhttp://arxiv.org/abs/astro-ph/9808257
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12809
dc.subjectAstrophysics
dc.titleGalaxy Clusters in the Hubble Volume Simulations
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