  We investigated almost 500 stars distributed among 193 binary or multiple
systems made of late-F, G-, or early-K primaries and late-K or M dwarf
companion candidates. For all of them, we compiled or measured coordinates,
J-band magnitudes, spectral types, distances, and proper motions.With these
data, we established a sample of 192 physically bound systems. In parallel, we
carried out observations with HERMES/Mercator and obtained high resolution
spectra for the 192 primaries and five secondaries. We used these spectra and
the automatic StePar code for deriving precise stellar atmospheric parameters:
Teff, log g, Vmicro, and chemical abundances for 13 atomic species, including
[Fe/H]. After computing Galactocentric space velocities for all the primary
stars, we performed a kinematic analysis and classified them in different
Galactic populations and stellar kinematic groups of very different ages, which
match our own metallicity determinations and isochronal age estimations. In
particular, we identified three systems in the halo and 33 systems in the young
Local Association, Ursa Major and Castor moving groups, and IC 2391 and Hyades
Superclusters. We finally studied the exoplanet-metallicity relation in our 193
primaries and made a list 13 M-dwarf companions with very high metallicity that
can be the targets of new dedicated exoplanet surveys. All in all, our dataset
will be of great help for future works on the accurate determination of
metallicity of M dwarfs.
