PoS - Proceedings of Science
Volume 428 - 15th European VLBI Network Mini-Symposium and Users' Meeting (EVN2022) - Masers
Unveiling fine details of the (giga)maser source in TXS2226-184 with the VLBI
A. Tarchi*, G. Surcis, P. Castangia, E. Ladu and E.Y. Bannikova
Full text: pdf
Pre-published on: February 13, 2023
Published on: August 22, 2023
Abstract
In nearby and distant active galactic nuclei (AGNs), water (mega)masers can be used to determine the accretion disk geometry and precise black hole masses, and standard-candles-independent distances to the host galaxy (disk-masers), to provide important information about the evolution of jets (jet-masers), and to trace the velocity and geometry of nuclear winds (outflow-masers). In the following, we report on the main outcome of our recent study, performed with the VLBA and EVN networks, of the water gigamaser in TXS2226-184. Our analysis indicates an association of the maser emission with a luminous radio knot in the nuclear region of the galaxy, seemingly part of a large scale radio jet, hence supporting a jet/outflow nature of the maser. In addition, we present new multi-frequency radio-continuum EVN observations of the innermost region of TXS2226-184 aimed at gaining a clearer picture of the nuclear individual components of the AGN and determining a more precise location of the supermassive black hole SMBH.
DOI: https://doi.org/10.22323/1.428.0036
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