Cosmological parameters from large scale structure observations
| dc.creator | Novosyadlyj, B. | |
| dc.creator | Durrer, R. | |
| dc.creator | Gottloeber, S. | |
| dc.creator | Lukash, V. N. | |
| dc.creator | Apunevych, S. | |
| dc.date | 1999-12-24 | |
| dc.date | 2000-02-16 | |
| dc.date.accessioned | 2026-07-07T02:35:11Z | |
| dc.date.available | 2026-07-07T02:35:11Z | |
| dc.description | The possibility of determining cosmological parameters on the basis of a wide set of observational data including the Abell-ACO cluster power spectrum and mass function, peculiar velocities of galaxies, the distribution of Ly-$α$ clouds and CMB temperature fluctuations is analyzed. Using a $χ^2$ minimization method, assuming $Ω_Λ+Ω_{\rm{matter}} =1 $ and no contribution from gravity waves, we found that a tilted $Λ$MDM model with one sort of massive neutrinos and the parameters $n=1.12\pm 0.10$, $Ω_m=0.41\pm 0.11$ ($Ω_Λ=0.59\pm0.11$), $Ω_{cdm}=0.31\pm 0.15$, $Ω_ν=0.059\pm 0.028$, $Ω_b=0.039\pm 0.014$ and $h=0.70\pm 0.12$ matches observational data best. The 1$σ$ (68.3%) confidence limits on each cosmological parameter, which are obtained by marginalizing over the other parameters, are $0.82\le n\le1.39$, $0.19\leΩ_m\le 1$ ($0\leΩ_Λ\le 0.81$), $0\leΩ_ν\le 0.17$, $0.021\le Ω_b\le 0.13$ and $0.38\le h\le 0.85$ $1.5\le b_{cl}\le 3.5$. Here $b_{cl}$ is the cluster bias parameter. The best-fit parameters for 31 models which are inside of $1σ$ range of the best model are presented. It is shown also that observational data set used here rules out the class of CDM models with $h\ge 0.5$, scale invariant primordial power spectrum, zero cosmological constant and spatial curvature at very high confidence level, $>99.99%$. The corresponding class of MDM models are ruled out at $\sim 95%$ C.L. | |
| dc.description | 19 pages, 9 figures. Accepted for publication in A&A | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9912511 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9912511 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/15523 | |
| dc.subject | Astrophysics | |
| dc.title | Cosmological parameters from large scale structure observations | |
| dc.type | text |