Discovery of H2O Megamasers in Obscured Active Galactic Nuclei

Abstract

Recently a new method to discover obscured active galactic nuclei (AGNs) by utilizing X-ray and Infrared data has been developed. We carried out a survey of H2O maser emission toward ten obscured AGNs with the Nobeyama 45-m telescope. We newly detected the maser emission with the signal-noise-ratio (SNR) of above 4 from two AGNs, NGC 1402 and NGC 7738. We also found a tentative detection with its SNR > 3 in NGC 5037. The detection rate of 20% is higher than those of previous surveys (usually several percents).

5 pages, 1 figures, 3 tables, accepted for publication in PASJ

References in corpus (4)

• The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue
• Prevalence of High X-ray Obscuring Columns among AGN that Host H${}_2$O Masers
• Kinematics, Substructure and Luminosity-weighted Dynamics of Six Nearby Galaxy Groups
• Searching for highly obscured AGN in the XMM-Newton serendipitous source catalog

Cited by in corpus (1)

• Water Maser Disk and a Supermassive Black Hole at the Nucleus of the Active Galaxy NGC 7738