Bayesian correction of H(z) data uncertainties
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We compile 41 H(z) data from literature and use them to constrain OΛCDM and flat ΛCDM parameters. We show that the available H(z) suffers from uncertainties overestimation and propose a Bayesian method to reduce them. As a result of this method, using H(z) only, we find, in the context of OΛCDM, H0 = 69.5 ± 2.5 kms-1 Mpc-1, Ωm = 0.242 ± 0.036, and ΩΛ = 0.68 ± 0.14. In the context of flatΛCDMmodel,we have foundH0 =70.4±1.2 kms-1 Mpc-1 and Ωm = 0.256 ± 0.014. This corresponds to an uncertainty reduction of up to ≈30 per cent when compared to the uncorrected analysis in both cases.
How to cite this document
Jesus, J. F. et al. Bayesian correction of H(z) data uncertainties. Monthly Notices of the Royal Astronomical Society, v. 477, n. 3, p. 2867-2873, 2018. Available at: <http://hdl.handle.net/11449/176338>.