The star-formation history of LGS 3

被引：13

作者：

Mould, J ^{[1
]}

机构：

[1] CALTECH,PALOMAR OBSERV,PASADENA,CA 91125

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 1997年 / 109卷 / 732期

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.

引用

页码：125 / 129

页数：5

共 22 条

[1] REDDENING ESTIMATES FOR GALAXIES IN THE 2ND REFERENCE CATALOG AND THE UPPSALA GENERAL CATALOG [J].