Properties of H II Region Populations in Galaxies. I. The First-ranked H II Regions
Properties of H II Region Populations in Galaxies. I. The First-ranked H II Regions
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星系中 H II 区总体的特性。
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
R. Kennicutt
中科院分区：
文献类型：
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作者：
R. Kennicutt
分析了95个附近螺旋星系和不规则星系中最亮H II区的H-α测光，以研究H II区种群对其母星系性质的依赖性。发现麦哲伦不规则星系中最亮的H II区比绝对星等相同的早型螺旋星系中的H II区亮约50倍。这表明，这种差异是由于在晚型星系的H II区的数量增加和恒星形成区域的特征尺寸的物理变化。62篇参考文献。
H-alpha photometry of the brightest H II regions in 95 nearby spiral and irregular galaxies has been analyzed in order to study the dependence of the H II region populations on the properties of their parent galaxies. It is found that the brightest H II regions in Magellanic irregular galaxies are about 50 times brighter than those in early-type spirals of the same absolute magnitude. It is suggested that this difference is due to both an increase in the numbers of H II regions in late-type galaxies and a physical change in the characteristic sizes of the star-forming regions. 62 references.