2MASS Observations of Spectroscopically Identified Extragalactic C Stars

Details 2MASS Observations of Spectroscopically Identified Extragalactic C Stars 2MASS Observations of Spectroscopically Identified Extragalactic C Stars

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aj....123.3428d&link_type=abstract

The Astronomical Journal, Volume 123, Issue 6, pp. 3428-3433.

Astronomy and Astrophysics

Astronomy

28

Galaxies: Individual: Name: Fornax, Galaxies: Magellanic Clouds, Stars: Carbon, Techniques: Photometric

Scientific paper

We matched spectroscopically identified C stars (from low-resolution objective prism surveys) in the Magellanic Clouds with Two Micron All Sky Survey (2MASS) sources. We confirm that C stars show a large spread in absolute magnitudes, even in the Ks band. We show that the I and Ks magnitude distributions of a population of C stars (in the LMC) have a similar narrow dispersion if the C stars are selected in a well-defined color range. Using magnitude and color criteria, we employ the 2MASS data to identify 26 C stars in the Fornax dwarf spheroidal galaxy. The mean Ks magnitude and the mean bolometric magnitude of C stars are found to be slightly brighter in the LMC and SMC when compared with those of the Fornax dwarf spheroidal galaxy. The difference could be explained by ages and/or abundance differences.

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