The calibration of the O/H abundance indicators for extragalactic HII regions based on OII recombination lines

被引：0

作者：

Peimbert, M. ^{[1
]}

Peimbert, A. ^{[1
]}

Esteban, C. ^{[2
]}

Garcia-Rojas, J. ^{[2
]}

Bresolin, F. ^{[3
]}

Carigi, L. ^{[1
]}

Ruiz, M. T. ^{[4
]}

Lopez-Sanchez, A. R. ^{[2
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Astron, Mexico City, DF, Mexico

[2] Inst Astrofis Canarias, Tenerife, Spain

[3] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

[4] Univ Chile, Dept Astron, Santiago, Chile

来源：

FIRST LIGHT SCIENCE WITH THE GTC | 2007年 / 29卷

关键词：

galaxies : abundances; HII regions;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Based on O II recombination lines we present a new calibration (called O IIRL) of Pagel's O-23 indicator to determine the O/H abundance ratio in extragalactic H II regions and emission line galaxies. The O IIRL calibration produces O/H abundances about a factor of two higher than those derived from the T(4363) method with t(2) = 0.00. The O IIRL calibration has implications for the study of different properties of emission line galaxies such as their metallicity, star formation rate, and initial mass function. The O IIRL calibration also affects the abundance determinations based on other O/H indicators, that include collisionally excited lines, like those known as O3N2, N-2, S-23, Ar3O3, and S3O3. We argue that the controversy between the T(4363) method and the photoionization models method to derive O/H values is mainly due to temperature variations inside the observed H II regions.

引用

页码：72 / +

页数：3

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