Determination of 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 | 2000-02-29 | |
| dc.date.accessioned | 2026-07-07T01:52:33Z | |
| dc.date.available | 2026-07-07T01:52:33Z | |
| 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 $Ω_Λ+Ω_m =1$ and no contribution from gravity waves, we found that a tilted $Λ$MDM model with one sort of massive neutrinos and the parameters $n\approx 1.12$, $Ω_m\approx 0.4$ ($Ω_Λ\approx 0.6$), $Ω_{cdm}\approx 0.3$, $Ω_ν\approx 0.06$, $Ω_b\approx 0.04$ and $h\approx 0.7$ matches observational data best. $Ω_ν$ is higher for more species of massive neutrinos, $\sim 0.1$ for two and $\sim 0.13$ for three species. $Ω_m$ raises by $\sim 0.08$ and $\sim 0.15$ respectively. Varying only a subset of parameters and fixing the others shows also that the observational data set used here rules out pure CDM models with $h\ge 0.5$, scale invariant primordial power spectrum, zero cosmological constant and spatial curvature at a very high confidence level, $>99.99%$. The corresponding class of MDM models are ruled out at $\sim 95%$ C.L. It is notable also that this data set determines the amplitude of scalar fluctuations approximately at the same level as COBE four-year data. It indicates that a possible tensor component in the COBE data cannot be very substantial. | |
| dc.description | 9 pages, 1 figures (Proceedings of IV International Conference "Cosmology. Relativistic Astrophysics. Cosmoparticle Physics", Moscow, 17-24 October 1999; to be published in "Gravitation & Cosmology, Vol. 5 (1999), Supplement) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0002522 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0002522 | |
| dc.identifier | Grav.Cosmol.Suppl. 6 (2000) 107-115 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/658 | |
| dc.subject | Astrophysics | |
| dc.title | Determination of cosmological parameters from large scale structure observations | |
| dc.type | text |