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外文期刊>The Astrophysical journal
>C Star Survey of Local Group Dwarf Galaxies. III. The Sagittarius Dwarf Irregular and the Leo I Dwarf Spheroidal Galaxies
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C Star Survey of Local Group Dwarf Galaxies. III. The Sagittarius Dwarf Irregular and the Leo I Dwarf Spheroidal Galaxies
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.
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