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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Bayesian correction of H(z) data uncertainties

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Author(s):
Jesus, J. F. [1, 2] ; Gregorio, T. M. [1] ; Andrade-Oliveira, F. [3, 4] ; Valentim, R. [5] ; Matos, C. A. O. [1]
Total Authors: 5
Affiliation:
[1] Univ Estadual Paulista UNESP, Campus Expt Itapeva, Rua Geraldo Alckmin 519, BR-18409010 Itapeva, SP - Brazil
[2] Univ Estadual Paulista UNESP, Fac Engn, Dept Fis & Quim, Av Dr Ariberto Pereira Cunha 333, BR-12516410 Guaratingueta, SP - Brazil
[3] Univ Estadual Paulista UNESP, Inst Fis Teor, BR-01140070 Sao Paulo, SP - Brazil
[4] Lab Interinst & Astron LIneA, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ - Brazil
[5] Univ Fed Sao Paulo UNIFESP, ICAQF, Dep Fis, Unidade Jose Alencar, Rua Sao Nicolau 210, BR-09913030 Diadema, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 477, n. 3, p. 2867-2873, JUL 2018.
Web of Science Citations: 4
Abstract

We compile 41 H(z) data from literature and use them to constrain O Lambda CDM and flat Lambda CDM 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 O Lambda CDM, H-0 = 69.5 +/- 2.5 kms(-1) Mpc(-1), Omega(m) = 0.242 +/- 0.036, and Omega(Lambda) = 0.68 +/- 0.14. In the context of flat Lambda CDMmodel, we have found H-0 = 70.4 +/- 1.2 kms(-1) Mpc(-1) and Omega(m) = 0.256 +/- 0.014. This corresponds to an uncertainty reduction of up to approximate to 30 per cent when compared to the uncorrected analysis in both cases. (AU)

FAPESP's process: 16/09831-0 - Neutron stars populations: Bayesian statistics tools
Grantee:Rodolfo Valentim da Costa Lima
Support type: Regular Research Grants
FAPESP's process: 13/26258-4 - Superdense matter in the universe
Grantee:Manuel Máximo Bastos Malheiro de Oliveira
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/05859-0 - The accelerating universe: nature and tests of dark energy and dark matter
Grantee:José Fernando de Jesus
Support type: Regular Research Grants