C star survey of the Local Group Galaxies. III The Sagittarius dwarf irregular and Leo I dwarf spheroidal galaxies

Details C star survey of the Local Group Galaxies. III The Sagittarius dwarf irregular and Leo I dwarf spheroidal galaxies C star survey of the Local Group Galaxies. III The Sagittarius dwarf irregular and Leo I dwarf spheroidal galaxies

2001-09-27

arxiv.org/abs/astro-ph/0109512v1

Astronomy and Astrophysics

Astrophysics

to be published in the Astronomical Journal

Scientific paper

10.1086/324735

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 7 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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