C Star Survey of Local Group Dwarf Galaxies. III. The Sagittarius Dwarf Irregular and the Leo I Dwarf Spheroidal Galaxies
Abstract
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.
- Publication:
-
The Astronomical Journal
- Pub Date:
- January 2002
- DOI:
- 10.1086/324735
- arXiv:
- arXiv:astro-ph/0109512
- Bibcode:
- 2002AJ....123..238D
- Keywords:
-
- Galaxies: Individual: Name: Sagittarius Dwarf Irregular;
- Galaxies: Individual: Name: Leo I;
- Galaxies: Stellar Content;
- Stars: Carbon;
- Astrophysics
- E-Print:
- to be published in the Astronomical Journal