Primordial helium abundance determinations

Based on the best observations of extragalactic H ii regions of low metal-licity available in the literature we redetermine the primordial helium abundance,Yp, taking into account all the observed He i line intensities with the exceptionof those strongly a ected by underlying absorption. We derive H...

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Udgivet i:Revista Mexicana de Astronomía y Astrofísica
Main Authors: Antonio Peimbert, Manuel Peimbert, Valentina Luridiana
Format: Artigo
Sprog:Inglês
Udgivet: Universidad Nacional Autónoma de México 2001
Fag:
Física, Astronomía y Matemáticas
GALAXIES: ISM
H II REGIONS
ISM: ABUNDANCES
GALAXIES: ABUNDANCES
Online adgang:https://www.redalyc.org/articulo.oa?id=57101034
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