A cross-check for H 0 from lyman-α forest and baryon. Acoustic oscillations
Abstract: A new method is proposed to infer the Hubble constant Ho through the ob served mean transmitted flux from high-redshift quasars and the baryon acoustic oscillations (BAOs). A semi-analytical model for the cosmological-independent vol ume 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 sam ples of Lyman-α forest and the BAO measurement, restricts (h,Ω m) to the intervals 0.19 ≤ Ω m ≤ 0.23 and 0.53 ≤ h ≤ 0.82 (1σ). 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.
| Principais autores: | , , |
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| Formato: | Digital revista |
| Idioma: | English |
| Publicado em: |
Universidad Nacional Autónoma de México, Instituto de Astronomía
2016
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| Acesso em linha: | http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012016000100003 |
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