Name    E_mail_Address  Scientific_Session      Contribution_type       Title   Authors_affiliations    Abstract        
ALLOIN  Danielle        danielle.alloin@cea.fr  EAS Symp.6:Dynamics of Galaxies and Galactic Nuclei.    oral    Dust and Molecular Content of the Lensed Quasar, MG0751+2716 at z=3.2   Alloin D. (CNRS/CEA), Kneib J.P. (CNRS), Guilloteau S. (CNRS), Bremer M. (IRAM) We used the IRAM interferometer to measure CO lines and continuum flux between 1 and 3mm in the lensed quasar MG0751+2716 at z=3.2. We use HST data and the high resolution MERLIN map at 6.2cm to build an improved model of the lens. Dust and molecules are closely related in this source. The SED from 0.45 to 204mm exhibits the signatures of two components: synchrotron emission from a core/jet system, and thermal emission realted to warm dust. CO line intensities are compatible with warm, dense molecular gas around the AGN, in a ring-like structure ~460pc in radius. The new lens model predicts an amplification from 16 to 25, depending on the frequency. The mass of molecular gas is about 10^10 solar masses, consistent with the dynamical
  mass. The gas to dust ratio is around 100.