A Reinvestigation of the Possible Metallicity Spread in NGC 3201

Details A Reinvestigation of the Possible Metallicity Spread in NGC 3201 A Reinvestigation of the Possible Metallicity Spread in NGC 3201

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pasp..115..819c&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 115, Issue 809, pp. 819-824.

Astronomy and Astrophysics

Astronomy

7

Galaxy: Globular Clusters: Individual: Ngc Number: Ngc 3201

Scientific paper

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 logg. 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.

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