A Reinvestigation of the Possible Metallicity Spread in NGC 3201
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We have conducted a reanalysis of the metallicity of six red giants within NGC 3201 on the basis of a new homogeneous set of spectra with resolution ∼30,000. Iron line strengths and the MOOG software suite were used to derive metallicities based on spectroscopically and photometrically estimated values of Teff and log g. We cannot confirm the presence of a significant spread in metallicity within the cluster greater than about 0.3 dex nor any significant correlation between metallicity and temperature, as first suggested by Gonzalez & Wallerstein. We call attention to the possibility that differences in boundary temperature for stars of the same Teff may lead to apparent differences in metallicity.
author list (cited authors)
Covey, K. R., Wallerstein, G., Gonzalez, G., Vanture, A. D., & Suntzeff, N. B
complete list of authors
Covey, Kevin R||Wallerstein, George||Gonzalez, Guillermo||Vanture, Andrew D||Suntzeff, Nicholas B