Discovery of H2O megamasers in obscured active galactic nuclei

Abstract A new method to discover obscured active galactic nuclei (AGNs) by utilizing X-ray and infrared data has recently been developed. We carried out a survey of H2O maser emission toward 10 obscured AGNs with the Nobeyama 45 m telescope. We newly detected the maser emission with a signal-noise-...

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Bibliographic Details
Published in:Publications of the Astronomical Society of Japan 2017-08, Vol.69 (4)
Main Authors: Yamauchi, Aya, Miyamoto, Yusuke, Nakai, Naomasa, Terashima, Yuichi, Okumura, Taishi, Zhou, Bin, Taniguchi, Kotomi, Kaneko, Hiroyuki, Matsumoto, Naoko, Salak, Dragan, Nishimura, Atsushi, Ueno, Saeko
Format: Article
Language:English
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Summary:Abstract A new method to discover obscured active galactic nuclei (AGNs) by utilizing X-ray and infrared data has recently been developed. We carried out a survey of H2O maser emission toward 10 obscured AGNs with the Nobeyama 45 m telescope. We newly detected the maser emission with a signal-noise-ratio (SNR) of above 4 from two AGNs; NGC 1402 and NGC 7738. We also found a tentative detection with SNR > 3 in NGC 5037. The detection rate of 20% is higher than those of previous surveys (usually several percent).
ISSN:0004-6264
2053-051X
DOI:10.1093/pasj/psx052