C star survey of local group dwarf galaxies. III. The Sagittarius dwarf irregular and the Leo I dwarf spheroidal galaxies

被引：43

作者：

Demers, S

Battinelli, P

机构：

[1] Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada

[2] Osserv Astron Roma, I-00136 Rome, Italy

来源：

ASTRONOMICAL JOURNAL | 2002年 / 123卷 / 01期

关键词：

galaxies : individual (Sagittarius dwarf irregular; Leo I); galaxies : stellar content; stars : carbon;

D O I：

10.1086/324735

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the latest results of our ongoing homogeneous cool C star survey of Local Group dwarf galaxies. We apply our two-color photometric technique to the study of two small galaxies: the Sagittarius dwarf (SagDIG) and Leo I. We identify 16 C stars in SagDIG and 13 C stars in Leo I. Even though both galaxies have a known C star population, we identify seven previously unknown C stars in each galaxy. The photometric properties of all the known C stars in each galaxy are presented. It is shown that our definition of a C star, based on our photometric criteria, produces a subset of carbon stars with homogeneous properties useful for population comparison.

引用

页码：238 / 243

页数：6

共 26 条

[21]

LETARTE B, 2002, IN PRESS AJ

[22] 2 NEW DWARF GALAXIES IN LOCAL GROUP - UKS 1927-177 AND UKS 2323-326 [J].