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CNO Abundances in the Quintuplet Cluster M Supergiant 5-7

S. V. Ram�rez,K. Sellgren,R. Blum,D. M. Terndrup

ASTRONOMISCHE NACHRICHTEN（2007）

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Abstract
We present and analyze infrared spectra of the supergiant VR 5-7, in the Quintuplet cluster 30 pc from the Galactic center. Within the uncertainties, the [C/H], [N/H], and [O/H] abundances in this star are equal to those of alpha Ori, a star which exhibits mixing of CNO processed elements, but are distinct from the abundance patterns in IRS 7.
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Key words
stars,abundances,Galactic center
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