Carbon stars in the Carina dwarf spheroidal galaxy

Details Carbon stars in the Carina dwarf spheroidal galaxy Carbon stars in the Carina dwarf spheroidal galaxy

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254..500m&link_type=abstract

Astrophysical Journal, Part 1, vol. 254, Mar. 15, 1982, p. 500-506.

Astronomy and Astrophysics

Astronomy

62

Carbon Stars, Galaxies, Infrared Astronomy, Prisms, Stellar Spectrophotometry, Galactic Evolution, Globular Clusters, Magellanic Clouds, Near Infrared Radiation, Red Giant Stars, Stellar Evolution, Stellar Luminosity

Scientific paper

A study of the Carina dwarf spheroidal galaxy has yielded eight carbon stars. Near-infrared JHK photometry has been obtained for six of them, showing that the brightest have derived bolometric magnitudes and colors similar to carbon stars in the Fornax dwarf galaxy. Five lie well above the normal red giant branch tip as defined by galactic globular clusters. These stars are probably more massive and younger than classical Population II stars in our Galaxy. The faintest star may be similar to the CH stars found in the globular cluster Omega Centauri and may be in a different evolutionary state. Comparison with the intermediate-age globular clusters of the Magellanic Clouds suggests that Carina is not purely an old stellar population. An upper limit to the most recent epoch of star formation is approximately eight billion years.

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