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Astron. Astrophys. 335, 919-921 (1998)

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Research Note

An insipid CH star in the Sculptor dwarf spheroidal galaxy *

Matthew D. Shetrone 1, Michael Briley 2 and James P. Brewer 1

1 European Southern Observatory, Casilla 19001, Santiago 19, Chile
2 Department of Physics and Astronomy, University of Wisconsin, Oshkosh, WI 54901, USA

Received 20 March 1998 / Accepted 20 April 1998

Abstract

A strong CN star in the Sculptor dwarf spheroidal galaxy discovered by Smith & Dopita (1983) has been found to be an insipid CH star. This star, Sculptor 314, exhibits both strong CN bands and strong CH bands ruling out any similarity with CN strong stars found in most globular clusters. No C2 bands are found in its spectra. Based on the derived abundances, when Sculptor 314 evolves further up the giant branch it will not develop strong C2 and will not appear similar to those CH stars which have been found by previous searches.

Key words: stars: carbon – galaxies: Sculptor dwarf spheroidal – galaxies: stellar content

* Based on observations carried out at the European Southern Observatory (La Silla, Chile)

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© European Southern Observatory (ESO) 1998

Online publication: June 26, 1998
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