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- W1782241010 abstract "We determine the density parameters $Omega_m$ of gravitating matter and $Omega_{Lambda}$ of vacuum energy, by making a $chi^2$ fit to nine independent astrophysical constraints. Paying rigorous attention to statistical detail, we find that the present best values are $Omega_m=0.31pm 0.07, Omega_{Lambda}=0.70pm 0.13$, where these $1sigma$ errors are approximately Gaussian (thus trivially convertible to whatever percentage confidence range desired). The total $chi^2$ is 2.5 for 7 degrees of freedom, testifying that the various systematic errors included are generous. Since $Omega_m + Omega_{Lambda}= 1.01pm 0.15$, it follows that the Einstein-de Sitter model is very strongly ruled out, that also any low-density model with $Omega_{Lambda}=0$ is ruled out, and that a flat cosmology is not only possible, but clearly preferred. In the flat case we find $Omega_m=0.31pm 0.04$, from which it follows that the age of the Universe is $t_0 = 13.7^{+1.2}_{-1.1}(0.68/h)$ Gyr." @default.
- W1782241010 created "2016-06-24" @default.
- W1782241010 creator A5041395311 @default.
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- W1782241010 date "1999-01-18" @default.
- W1782241010 modified "2023-09-27" @default.
- W1782241010 title "Determination of the dynamical parameters of the Universe and its age" @default.
- W1782241010 hasPublicationYear "1999" @default.
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