Star formation histories of nearby dwarf galaxies

被引：78

作者：

Grebel, EK ^{[1
]}

机构：

[1] Max Planck Inst Astron, D-69117 Heidelberg, Germany

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2001年 / 277卷 / Suppl 1期

关键词：

Dwarf galaxies; Local Group; galaxy evolution; star formation;

D O I：

10.1023/A:1012742903265

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Properties of nearby dwarf galaxies are briefly discussed. Dwarf galaxies vary widely in their star formation histories, the ages of their subpopulations, and in their enrichment history. Furthermore, many dwarf galaxies show evidence for spatial variations in their star formation history; often in the form of very extended old populations and radial gradients in age and metallicity. Determining factors in dwarf galaxy evolution appear to be both galaxy mass and environment. We may be observing continuous evolution from low-mass dwarf irregulars via transition types to dwarf spheroidals, whereas other evolutionary transitions seem less likely.

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页码：231 / 239

页数：9

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