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arXiv · 1201.1108

Metallicities for 6 nearby open clusters from high-resolution spectra of giant stars. [Fe/H] values for a planet search sample

N. C. Santos·C. Lovis·J. Melendez·M. Montalto·D. Naef·G. Pace
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Abstract

We present a study of the stellar parameters and iron abundances of 18 giant stars in 6 open clusters. The analysis was based on high-resolution and high-S/N spectra obtained with the UVES spectrograph (VLT-UT2). The results complement our previous study where 13 clusters were already analyzed. The total sample of 18 clusters is part of a program to search for planets around giant stars. The results show that the 18 clusters cover a metallicity range between -0.23 and +0.23 dex. Together with the derivation of the stellar masses, these metallicities will allow the metallicity and mass effects to be disentangled when analyzing the frequency of planets as a function of these stellar parameters.

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N. C. Santos, C. Lovis, J. Melendez, M. Montalto, D. Naef, G. Pace. 2012-01-05. Metallicities for 6 nearby open clusters from high-resolution spectra of giant stars. [Fe/H] values for a planet search sample. https://doi.org/10.1051/0004-6361%2F201118276

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