Cosmological parameters from complementary observations of the Universe

We use observational data on the large-scale structure (LSS) of the Universe measured over a wide range of scales,, from subgalactic up to horizon scale, and on the cosmic microwave background anisotropies to determine cosmological parameters within the class of adiabatic inflationary models. We show that a mixed dark matter model with cosmological constant (Lambda MDM model) and parameters Omega (m) = 0.37(-0.15)(+0.25), Omega (Lambda) = 0.69(-0.20)(+0.15), Omega (v) = 0.03(-0.03)(+0.07), N-v = 1, Omega (b), 0.037(-0.018)(+0.033) n(s) = 1.02(-0.10)(+0.09), h = 0.71(-0.19)(+0.22), bcl = 2.4(-0.7)(+0.7) (1 sigma confidence limits) matches observational data on LSS, the nucleosynthesis constraint, direct measurements of the Hubble constant, the high-redshift supernova type Ia results and the recent measurements of the location and amplitude of the first acoustic peak in the cosmic microwave background (CMB) anisotropy power spectrum. The best model is Lambda -dominated (65 per cent of the total energy density) and has slightly positive curvature, Omega = 1.06. The clustered matter consists of 8 per cent massive neutrinos, 10 per cent baryons and 82 per cent cold dark matter (CDM). The upper 2 sigma limit on the neutrino content can be expressed in the form Omega (v)h(2)/N-v(0.64) less than or equal to 0.042 or, via the neutrino mass, m(v) less than or equal to 4.0 eV. The upper 1(2)sigma limit for the contribution of a tensor mode to the COBE DMR data is T/S < 1(1.5). Furthermore, it is shown that the LSS observations, together with the Boomerang (+MAXIMA-1) data on the first acoustic peak, rule out zero-h models at more than a 2<sigma> confidence limit.