Open AccessOH megamaser galaxies observations with RATAN-600
Author(s) -
А. Г. Михайлов,
Yu. V. Sotnikova,
Т. В. Муфахаров,
М. Г. Мингалиев,
Н. Н. Бурсов,
Т. А. Семенова,
V. Stolyarov,
Zengwen Wu
Publication year - 2022
Publication title -
astronomy at the epoch of multimessenger studies. proceedings of the vak-2021 conference, aug 23–28, 2021
Language(s) - English
Resource type - Conference proceedings
DOI - 10.51194/vak2021.2022.1.1.156
Subject(s) - megamaser , ohm , maser , physics , astrophysics , galaxy , active galactic nucleus , astronomy , quantum mechanics
We present the results of pilot observations of the OH megamaser (OHM) sample carried out with the radio telescopeRATAN-600 at 1.2, 2.3, 4.7, 8.2, 11.2, and 22.3 GHz in 2019–2021. When comparing the radio continuum properties ofthe OHM sample and the control sample of galaxies without detected maser emission, we determine the median spectralindex at 4.7 GHz α 4.7 = −0.59 for the OHM sample, and α 4.7 = −0.71 for the non-OHM galaxies, and steep radiospectra prevail in both samples. Subsamples of OHMs powered by active galactic nuclei (AGN) and star formation have nosignicant dierences in their radio properties. AGN-powered galaxies exhibit larger scatter in a range of parameters andtheir standard deviations.