Primordial Helium Abundance Determinations

Bibcode
2001RMxAC..10..148P
Peimbert, A.; Peimbert, M.; Luridiana, V.
Referencia bibliográfica

The Seventh Texas-Mexico Conference on Astrophysics: Flows, Blows and Glows (Eds. William H. Lee and Silvia Torres-Peimbert) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 10, pp. 148-153 (2001)

Fecha de publicación:
3
2001
Número de autores
3
Número de autores del IAC
0
Número de citas
8
Número de citas referidas
5
Descripción
Based on the best observations of extragalactic H II regions of low metallicity available in the literature we redetermine the primordial helium abundance, Y[p], taking into account all the observed He I line intensities with the exception of those strongly affected by underlying absorption. We derive He/H, N[e](He II), T[e](He II), and τ (3889) self-consistently. We present results for NGC 346, I Zw 18, and NGC 2363. From these objects we find that Y[p] = 0.2351+/-0.0022.
Tipo
Sin árbitro
Galaxias
Regiones H II

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