Abstract Extragalactic water maser emissions at 22 GHz have been playing vital roles in astrophysics. The limited detection rate of these masers has been motivating researchers to find clues that can help characterise them. The physical environments 22 GHz masers formed in are still ambiguous. Accordingly, statistical studies have been thoroughly used to resolve these favourable environments. This work goes through the essential parameter of Active Galactic Nuclei (AGN), namely, the mass of the central supermassive black hole (MBH) of the maser host galaxy. We study the correlation between maser luminosity (LH2O) and MBH in sub-samples of megamasers (MMs), kilomasers (KMs), and disc masers. The regression line of the relation is also calculated for these sub-samples. Unlike the results of previous works, dividing the maser sample into MMs and KMs gives no privilege to MM galaxies. Contrary to expectation, KMs have weak and low significant LH2O - MBH correlation, while MMs show no correlation. The positive correlation in KMs can be explained by the role of AGN therein, while the diversity of MMs types, with some of which are not strongly related to AGN, may explain the correlation missing. Surprisingly, the 28 disc maser sample, where tight correlation is expected, shows a very weak and low significant LH2O-MBH correlation. Future VLBI studies will eventually lead to a specific classification of a good number of maser galaxies, which is essential to establishing the LH2O-MBH relation.
Water megamasers and the central black hole masses in a large sample of galaxies
Advances in Space Research ; 71 , 8 ; 3499-3507
2022-11-27
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Black Hole Masses and Eddington Ratios of AGNs Contributing Most of the XRB
British Library Conference Proceedings | 2005
|Nearby dwarf galaxies: dust masses and their implications
British Library Online Contents | 1992
|Spectral behaviour of an INTEGRAL sample of black hole candidates: Initial results
Online Contents | 2006
|Vibrations of Sandwich Beams with Central Masses
AIAA | 1975
|