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Constraining cosmological models with cluster power spectra  J. Retzlaff
; S. Borgani
; S. Gottloeber
; A. Klypin
; V. Mueller
;  Date: 
5 Sep 1997  Journal:  New Astron. A3 (1998) 631  Subject:  astroph  Abstract:  Using extensive Nbody simulations we estimate redshift space power spectra of clusters of galaxies for different cosmological models (SCDM, TCDM, CHDM, LambdaCDM, OCDM, BSI, tauCDM) and compare the results with observational data for AbellACO clusters. Our mock samples of galaxy clusters have the same geometry and selection functions as the observational sample which contains 417 clusters of galaxies in a double cone of galactic latitude b > 30 degrees up to a depth of 240 Mpc/h. The power spectrum has been estimated for wave numbers k in the range 0.03 < k < 0.2 h/Mpc. For k > k_max ~ 0.05 h/Mpc the power spectrum of the AbellACO clusters has a powerlaw shape, P(k)propto k^n, with n ~ 1.9, while it changes sharply to a positive slope at k < k_max. By comparison with the mock catalogues SCDM, TCDM (n=0.9), and also OCDM with Omega_0 = 0.35 are rejected. Better agreement with observation can be found for the LambdaCDM model with Omega_0 = 0.35 and h = 0.7 and the CHDM model with two degenerate neutrinos and Omega_HDM = 0.2 as well as for a CDM model with broken scale invariance (BSI) and the tauCDM model. As for the peak in the AbellACO cluster power spectrum, we find that it does not represent a very unusual finding within the set of mock samples extracted from our simulations.  Source:  arXiv, astroph/9709044  Services:  Forum  Review  PDF  Favorites 


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