Ionized gas in dwarf galaxies: Abundance indicators

被引：0
作者：
Stasinska, Grazyna [1 ]
机构：
[1] Univ Paris Diderot, LUTH, Observ Paris, CNRS, F-92190 Meudon, France
来源：
LOW-METALLICITY STAR FORMATION: FROM THE FIRST STARS TO DWARF GALAXIES | 2008年 / 255期
关键词：
(ISM:) HII regions; galaxies: abundances; galaxies: dwarf;
D O I：
10.1017/S1743921308025106
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 comenting 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.
引用
收藏
页码：375 / 380
页数：6
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