Parameters of cosmological models and recent astronomical observations

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For different gravitational models we consider limitations on their parameters coming from recent observational data for type Ia supernovae, baryon acoustic oscillations, and from 34 data points for the Hubble parameter H(z) depending on redshift. We calculate parameters of 3 models describing accelerated expansion of the universe: the ΛCDM model, the model with generalized Chaplygin gas (GCG) and the multidimensional model of I. Pahwa, D. Choudhury and T.R. Seshadri. In particular, for the ΛCDM model 1σ estimates of parameters are: H₀=70.262±0.319 kmc⁻¹Mpc⁻¹, Ωₘ=0.276₋₀.₀₀₈⁺⁰.⁰⁰⁹, ΩΛ=0.769±0.029, Ωₖ=-0.045±0.032. The GCG model under restriction α≥0 is reduced to the ΛCDM model. Predictions of the multidimensional model essentially depend on 3 data points for H(z) with z≥2.3.