The ionization equilibrium of iron in HII regions

被引：0
|
作者：
Rodríguez, M [1 ]
Rubin, RH [1 ]
机构：
[1] INAOE, Puebla 72000, Mexico
来源：
RECYCLING INTERGALACTIC AND INTERSTELLAR MATTER | 2004年 / 217期
关键词：
D O I：
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the ionization equilibrium of Fe using photoionization models that incorporate improved values for the relevant atomic data. The previously available photoionization models predict concentrations of Fe3+ which are a factor of 3-8 higher than the values inferred from emission lines of [Fe III] and [Fe IV]. Our new models reduce these discrepancies to factors of 2-5. We comment on the possible reasons behind the remaining discrepancies, and present an updated ionization correction factor for obtaining the Fe abundance from the Fe++ abundance.
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页码：188 / 189
页数：2
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