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Ionized gas in dwarf galaxies: Abundance indicators

Published online by Cambridge University Press:  01 June 2008

Grażyna Stasińska
Grażyna Stasińska*
Affiliation:
LUTH, Observatoire de Paris, CNRS, Université Paris Diderot; Place Jules Janssen 92190 Meudon, France email: grazyna.stasinsa@obspm.fr
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Abstract

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We discuss the four basic methods to derive HII region abundances in metal-poor galaxies by presenting a few recent results obtained with these methods. We end up by commenting on the yet unsolved problem of temperature fluctuations in HII regions, which may plague abundance determinations, as well as the discrepancy between abundances derived from recombination lines and collisionally excited lines, to which inhomogeneous chemical composition might be the explanation.

Keywords

(ISM:) HII regionsgalaxies: abundancesgalaxies: dwarf
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Issue S255: Low-Metallicity Star Formation: From the First Stars to Dwarf Galaxies , June 2008 , pp. 375 - 380
Copyright
Copyright © International Astronomical Union 2008

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