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Paper: The Nuclear Region of a Megamaser in a Southern AGN, NGC 5793: Parsec-Scale Structure and OH Absorption
Volume: 144, Radio Emission from Galactic and Extragalactic Compact Sources, IAU Colloquium 164
Page: 233
Authors: Hagiwara, Y.; Kawabe, R.; Nakai, N.; Diamond, P. J.
Abstract: We have carried out VLBA observations of the OH absorption lines toward the nucleus of the active galaxy, NGC 5793, which is known to have a megamaser in its center. We have also successfully made its continuum image at the L band. It reveals the typical ``core-jet'' structure on parsec scales. Uniform values of optical depth at each point against the background radio continuum source shows that the column densities of the OH absorbing cloud uniformly distributes around the radio compact nucleus.
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