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On the Metallicity of Blue Compact Dwarf Galaxies from Tailor-MadeModels

Published online by Cambridge University Press:  11 July 2011

M. Koleva ,
Ph. Prugniel ,
I. Vauglin ,
E. Pérez-Montero ,
R. García-Benito ,
G.F. Hägele  and
Á.I. Díaz
E. Pérez-Montero
Affiliation:
Instituto de Astrofísica de Andalucía - CSIC, Spain
R. García-Benito
Affiliation:
Kavli Institute of Astronomy and Astrophysics, China
G.F. Hägele
Affiliation:
Dpto. de Física Teórica, Universidad Autónoma de Madrid, Spain
Á.I. Díaz
Affiliation:
Dpto. de Física Teórica, Universidad Autónoma de Madrid, Spain
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Abstract

Blue compact dwarf galaxies take up the low end of the distribution of metallicity as derived using collisional emission lines in ionized gaseous nebulae. In fact, the most metal poor objects in the Local Universe belong to this category. Nevertheless, the abundance discrepancy factor (ADF) found in some local HII regions whose metallicity have been derived by means of recombination lines and the offset claimed by some authors in relation to the predictions of some photoionization models question the real chemical status of these objects. In this contribution, we summarize the results of Pérez-Montero  (2010, MNRAS, 404, 2037) and we show how tailor-made models of a subsample of HII galaxies with a good determination of the thermal inner structure can be used to shed some light on this issue, helping also to study their star formation history and the properties of their ionizing stellar clusters.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 48: CRAL-2010 A Universe of Dwarf Galaxies , 2011 , pp. 125 - 126
Copyright
© EAS, EDP Sciences, 2011

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