Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2009-12-18
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
8 pages, Conference proceedings of "Highlights of Boletin de los Observatorios de Tonantzintla y Tacubaya" to appear in Revist
Scientific paper
We present a review about the relevance of the paper by Peimbert and Costero
(1969), on the chemical abundance determinations of H II regions. We analize
the observational evidence in favor of the presence of temperature variations
inside gaseous nebulae. We make a brief mention of the methods used to estimate
the contribution of the unobserved ions to the total chemical abundances.
Peimbert Antonio
Peimbert Manuel
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