Abundance ratios \& ages of stellar populations in HARPS-GTO sample
  In this work we present chemical abundances of heavy elements (Z$>$28) for a
homogeneous sample of 1059 stars from HARPS planet search program. We also
derive ages using parallaxes from Hipparcos and Gaia DR1 to compare the
results. We study the [X/Fe] ratios for different populations and compare them
with models of Galactic chemical evolution. We find that thick disk stars are
chemically disjunt for Zn and Eu. Moreover, the high-alpha metal-rich
population presents an interesting behaviour, with clear overabundances of Cu
and Zn and lower abundances of Y and Ba with respect to thin disk stars.
Several abundance ratios present a significant correlation with age for
chemically separated thin disk stars (regardless of their metallicity) but
thick disk stars do not present that behaviour. Moreover, at supersolar
metallicities the trends with age tend to be weaker for several elements.
