Spectroscopy of H II regions in M81 group dwarf galaxies

被引：47

作者：

Miller, BW ^{[1
]}

Hodge, P ^{[1
]}

机构：

[1] UNIV WASHINGTON, DEPT ASTRON, SEATTLE, WA 98195 USA

来源：

ASTROPHYSICAL JOURNAL | 1996年 / 458卷 / 02期

关键词：

galaxies; abundances; clusters; individual; (M81); irregular; ISM; H II regions;

D O I：

10.1086/176829

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present nebular spectroscopy of H II regions in the M81 Group irregular galaxies M81dB, Ho I, and IC 2574. The empirical, or bright line, method is used to determine the oxygen abundances and ionization parameters. When the [O III] lambda 4363 line is detected, the directly calculated oxygen abundances agree with the empirical values within the uncertainties. The oxygen abundances are typically similar to 0.12 solar and are consistent with the log (O/H)-M(B) relation. Nitrogen abundances are also normal for irregular galaxies.

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页码：467 / 473

页数：7

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