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Title:
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.
Affiliation:
AA(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany ), AB(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany ; Astron. Dept., King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia), AC(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany ), AD(National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA; Joint ALMA Office, Alonso de Córdova 3107, Vitacura, Santiago, Chile), AE(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany ), AF(National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA), AG(Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA), AH(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA), AI(National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA), AJ(National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA), AK(Department of Physics, National Sun Yat-Sen University, No.70, Lianhai Road, Gushan Dist., Kaohsiung City 804, Taiwan (R.O.C.)), AL(Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Campus Hubland Nord, Emil-Fischer-Str. 31, 97074 Würzburg, Germany; Dr. Remeis-Observatory, Erlangen Centre for Astroparticle, Physics, University of Erlangen-Nüremberg, Sternwartstr. 7, 96049 Bamberg, Germany), AM(Dr. Remeis-Observatory, Erlangen Centre for Astroparticle, Physics, University of Erlangen-Nüremberg, Sternwartstr. 7, 96049 Bamberg, Germany)
Publication:
Astrophysical Masers: Unlocking the Mysteries of the Universe, Proceedings of the International Astronomical Union, IAU Symposium, Volume 336, pp. 139-140
Publication Date:
08/2018
Origin:
CUP
Keywords:
Galaxies: active-Galaxies: jets-Galaxies: nuclei, Galaxies: Seyfert-Radio continuum: galaxies
Abstract Copyright:
(c) 2018: Copyright © International Astronomical Union 2018
DOI:
10.1017/S174392131701095X
Bibliographic Code:
2018IAUS..336..139K

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 H2O 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 sigma 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.
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