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    The Sub-PC Scale Accretion Disk of NGC 4258

    Water megamasers have been found to trace parsec/sub-parsec, circumnuclear accretion disks in several AGN (e.g., Circinus, NGC 1068 & NGC 4258). High-spatial (0.5 mas) and velocity resolution (0.2 km s−1) VLBA im...

    E.M.L. Humphreys, A.L. Argon, L.J. Greenhill… in Dense Molecular Gas Around Protostars and … (2005)