We present new radial velocity measurements for three low-metallicity solar-like stars observed with the SOPHIE spectrograph and its predecessor ELODIE , both installed at the 193 cm telescope of the Haute-Provence Observatory , allowing the detection and characterization of three new giant extrasolar planets in intermediate periods of 1.7 to 3.7 years .
All three stars , HD17674 , HD42012 and HD29021 present single giant planetary companions with minimum masses between 0.9 and 2.5 M _ { Jup } .
The range of periods and masses of these companions , along with the distance of their host stars , make them good targets to look for astrometric signals over the lifetime of the new astrometry satellite Gaia .
We discuss the preliminary astrometric solutions obtained from the first Gaia data release .