  We present the performances of a radial velocity measurement method that we
developed for A-F type stars. These perfomances are evaluated through an
extensive set of simulations, together with actual radial velocity observations
of such stars using the ELODIE and HARPS spectrographs. We report the case of
stars constant in radial velocity, the example of a binary detection on HD
48097 (an A2V star, with vsini equal to 90 km/s) and a confirmation of the
existence of a 3.9 MJup planet orbiting around HD 120136 (Tau Boo). The
instability strip problem is also discussed. We show that with this method, it
is in principle possible to detect planets and brown dwarfs around A-F type
stars, thus allowing further study of the impact of stellar masses on planetary
system formation over a wider range of stellar masses than is currently done.
