Physico-chemistry of protoplanetary disks : the PdBI look
          Vincent Pietu, Observatoire de Bordeaux, France
          Anne Dutrey, Observatoire de Bordeaux, France
          Stephane Guilloteau, Observatoire de Bordeaux, France

          We present resolved maps of various molecular tracers obtained with the IRAM Plateau de Bure Interferometer in the surroudings of the T Tauri stars DM Tau and LkCa 15, and the Herbig Ae star MWC480. We have carried a preliminary analysis with a LTE code that already allow to prove that all rotationnal transitions arise from the same disks, and that given that the signal to noise ratio is sufficient, the method is robust.