Discovery of Candidate H${}_2$O Disk Masers in AGN and Estimations of Centripetal Accelerations

Lincoln J. Greenhill, Paul T. Kondratko, James M. Moran +1

Based on spectroscopic signatures, about one-third of known H${}_2$O maser sources in active galactic nuclei (AGN) are believed to arise in highly inclined accretion disks around cen…