Journal Article

Abundance analysis of four members of the metal-rich open cluster NGC 6253*

M. Montalto, N. C. Santos, S. Villanova, G. Pace, G. Piotto, S. Desidera, F. De Marchi, L. Pasquini and I. Saviane

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 423, issue 4, pages 3039-3048
Published in print July 2012 | ISSN: 0035-8711
Published online July 2012 | e-ISSN: 1365-2966 | DOI:
Abundance analysis of four members of the metal-rich open cluster NGC 6253*

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We report on VLT/UVES high-resolution spectra of four members of the old metal-rich open cluster NGC 6253: a main-sequence star, two red-clump stars and a blue straggler. We performed equivalent width analysis and derived Fe, Si, Ca, Ti, Cr and Ni abundances as well as abundance ratios. For our main-sequence star, we obtained a metallicity of (rms), whereas for the two giants we found that our metallicities are on average +0.19 ± 0.13 (rms), lower than what was determined for the same stars in previous studies. We also found that, within the uncertainties, the abundance ratios of α and iron-peak elements match those in the solar surroundings, with the possible exception of Si in two giant stars in our sample.

Keywords: techniques: spectroscopic; stars: abundances; open clusters and associations: individual: NGC 6253

Journal Article.  5660 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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