New extra-solar planets: the metallicity distribution revisited

We present the spectroscopy results of a new set of planetary host stars discovered in the context of the Geneva extra-solar planet search programme. The analysis was based on high S/N spectra obtained with the CORALIE spectrograph at the 1.2-m Euler Swiss Telescope (at La Silla, ESO). We revisit the metallicity distribution of stars with planets. The present sample, largely enriched by the inclusion of the most recent discoveries, strongly suggests that stars with planets are anomalously metal rich, but that the source of the metallicity excess is most probably "primordial".