A CROSS-CHECK FOR H-0 FROM LYMAN-alpha FOREST AND BARYON ACOUSTIC OSCILLATIONS

Autor(es)

Busti, V. C. ^{[1, 2, 3]} ; Guimaraes, R. N. ^{[4, 5]} ; Lima, J. A. S. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Cape Town, ACGC, ZA-7701 Cape Town - South Africa

^[2] Univ Cape Town, Dept Math & Appl Math, ZA-7701 Cape Town - South Africa

^[3] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer IAG USP, BR-05508900 Sao Paulo, SP - Brazil

^[4] Minist Educ Brazil, CAPES Fdn, Brasilia, DF - Brazil

^[5] Univ Politecn Valencia, ITACA Inst, Biomed Informat Grp IBIME, Valencia - Spain

• Tipo de documento: Artigo Científico
• Fonte: REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA; v. 52, n. 1, p. 3-10, APR 2016.
• Citações Web of Science: 0

Resumo

A new method is proposed to infer the Hubble constant H-0 through the observed mean transmitted flux from high-redshift quasars and the baryon acoustic oscillations (BAOs). A semi-analytical model for the cosmological-independent volume density distribution function was adopted; it allowed us to obtain constraints on the cosmological parameters once a moderate knowledge of the Inter Galactic Medium (IGM) parameters is assumed. Our analysis, based on two different samples of Lyman-alpha forest and the BAO measurement, restricts (h, Omega(m)) to the intervals 0.19 <= Omega(m) <= 0.23 and 0.53 <= h <= 0.82 (1 sigma). Although the constraints are weaker compared with other estimates, we point out that, with a bigger sample and a better knowledge of the IGM, this method could provide complementary results to measure the Hubble constant independently of the cosmic distance ladder. (AU)

• Processo FAPESP: 04/13668-0 - Cosmologia na era da precisão: energia escura, matéria escura e radiação cósmica de fundo
• Beneficiário: Jose Ademir Sales de Lima
• Modalidade de apoio: Auxílio à Pesquisa - Temático