Molecular gas dynamics around nuclei of galaxies

Recent molecular line observations with ALMA in several nearby Seyferts have revealed the existence of tori, and nature gas flows at 10-20 pc scale. At 100 scale, or kpc-scale, previous NOEMA work on gravitational torques had shown that only about one third Seyfert galaxies experienced inflow central fueling, while most cases was stalled rings. higher resolution, i.e. it is possible now to see some AGN fueling due nuclear trailing spirals, influenced by black hole potential. This brings smoking gun evidence for fueling. In our sample galaxies, angular resolution up 60 mas allows us reach (BH) sphere influence BH mass can be derived more directly than M-sigma relation.