N. C. Santos, C. Lovis, J. Melendez, M. Montalto, D. Naef, G. Pace
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.
View original:
http://arxiv.org/abs/1201.1108
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