Bayesian correction of H(z) data uncertainties
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Data
2018-07-01
Autores
Jesus, J. F. [UNESP]
Gregório, T. M. [UNESP]
Andrade-Oliveira, F. [UNESP]
Valentim, R.
Matos, C. A.O. [UNESP]
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Resumo
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.
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Palavras-chave
Cosmological parameters, Cosmology: Observations, Dark energy, Dark matter
Como citar
Monthly Notices of the Royal Astronomical Society, v. 477, n. 3, p. 2867-2873, 2018.