The star-formation history of LGS 3

被引:13
作者
Mould, J [1 ]
机构
[1] CALTECH,PALOMAR OBSERV,PASADENA,CA 91125
关键词
D O I
10.1086/133867
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
LGS 3 presents the optical appearance of a dwarf spheroidal galaxy, but has a significant neutral hydrogen component. Photometry of its brightest stars with COSMIC at the prime focus of the Hale telescope shows a 10(8)-yr-old population and a 10(10)-yr-old population. Either we are seeing a recent burst of star formation in a dwarf spheroidal galaxy, or, if intermediate-age populations are also present, we are witnessing a recent transition from a dwarf irregular to a dwarf spheroidal galaxy.
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页码:125 / 129
页数:5
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