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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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| Publicat a: | Revista Mexicana de Astronomía y Astrofísica |
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| Autors principals: | , , |
| Format: | Artigo |
| Idioma: | Inglês |
| Publicat: |
Universidad Nacional Autónoma de México
2001
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| Matèries: | |
| Accés en línia: | https://www.redalyc.org/articulo.oa?id=57101034 |
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