Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-09-04
New Astron. A3 (1998) 631
Astronomy and Astrophysics
Astrophysics
LaTeX, 27 pages, 8 figures (EPS). Revised version (title changed, CHDM model added, discussion expanded). Accepted by NewA
Scientific paper
10.1016/S1384-1076(98)00034-7
Using extensive N-body simulations we estimate redshift space power spectra of clusters of galaxies for different cosmological models (SCDM, TCDM, CHDM, Lambda-CDM, OCDM, BSI, tau-CDM) and compare the results with observational data for Abell-ACO 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 Abell-ACO clusters has a power-law 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 Lambda-CDM 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 tau-CDM model. As for the peak in the Abell-ACO cluster power spectrum, we find that it does not represent a very unusual finding within the set of mock samples extracted from our simulations.
Borgani Stefano
Gottloeber Stefan
Klypin Anatoly
Mueller Volker
Retzlaff Joerg
No associations
LandOfFree
Constraining cosmological models with cluster power spectra does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Constraining cosmological models with cluster power spectra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining cosmological models with cluster power spectra will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-10801