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THE DYNAMICAL PARAMETERS OF THE UNIVERSE

Matts Roos and S. M. Harun-or-Rashid

Department of Physics, Division of High Energy Physics,
University of Helsinki, Finland


Abstract. The results of different analyses of the dynamical parameters of the Universe are converging towards agreement. Remaining disagreements reflect systematic errors coming either from the observations or from differences in the methods of analysis. Compiling the most precise parameter values with our estimates of such systematic errors added, we find the following best values: the baryonic density parameter Omegab h2 = 0.019 ± 0.02, the density parameter of the matter component Omegam = 0.29 ± 0.06, the density parameter of the cosmological constant Omegalambda = 0.71 ± 0.07, the spectral index of scalar fluctuations ns = 1.02 ± 0.08, the equation of state of the cosmological constant wlambda < -0.86, and the deceleration parameter q0 = -0.56 ± 0.04. We do not modify the published best values of the Hubble parameter H0 = 0.73 ± 0.07 and the total density parameter Omegao -0.02+0.03.


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