Radio continuum of galaxies with H2O megamaser disks.

Authors :: Kamali, F.
Henkel, C.
Brunthaler, A.
Impellizzeri, C. M. V.
Menten, K. M.
Braatz, J. A.
Greene, J. E.
Reid, M. J.
Condon, J. J.
Lo, K. Y.
Kuo, C. Y.
Litzinger, E.
Kadler, M.
Tarchi, A.
Reid, M.J.
Castangia, P.
Source :: Proceedings of the International Astronomical Union; Sep2017, Vol. 13 Issue S336, p139-140, 2p
Publication Year :: 2017
Abstract: In our attempt to investigate the basic active galactic nucleus (AGN) paradigm requiring a centrally located supermassive black hole (SMBH), a close to Keplerian accretion disk and a jet perpendicular to its plane, we have searched for radio continuum in galaxies with H<subscript>2</subscript>O megamasers in their disks. We observed 18 such galaxies with the Very Large Baseline Array in C band (5 GHz, ~2 mas resolution) and we detected 5 galaxies at 8 σ or higher levels. For those sources for which the maser data is available, the positions of masers and those of the 5 GHz radio continuum sources coincide within the uncertainties, and the radio continuum is perpendicular to the maser disk's orientation within the position angle uncertainties. [ABSTRACT FROM AUTHOR]