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1999AJ....118.1645C - Astron. J., 118, 1645-1656 (1999/October-0)
Abundances of red giants in the Andromeda II dwarf spheroidal galaxy.
COTE P., OKE J.B. and COHEN J.G.
Abstract (from CDS):
Our spectroscopic sample contains one carbon star. We measure MI≃-3.8 for this star, which places it below the tip of the red giant branch and suggests a common origin with the CH stars found in the Galactic halo. Although this carbon star alone does not provide evidence of an intermediate-age component in Andromeda II, two other stars in our spectroscopic sample have MI≃-4.7 and -4.5. Membership in Andromeda II is unambiguous in both cases, indicating that these stars fall along an extended asymptotic giant branch and pointing to the presence of a modest intermediate-age population in this galaxy.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Abundances - Galaxies: Evolution - galaxies: individual (Andromeda II) - Galaxies: Structure - Stars: Abundances
Nomenclature: Table 1: [COC99] NN (Nos 1-50).
CDS comments: p.1648: stars ANNN = [OA85] NNN
Simbad objects: 79
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