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Water masers associated with AGN in radio galaxies

Published online by Cambridge University Press:  07 February 2024

Satoko Sawada-Satoh Open the ORCID record for Satoko Sawada-Satoh [Opens in a new window]
Satoko Sawada-Satoh*
Affiliation:
Osaka Metropolitan University, Sakai-shi, Osaka 599-8531, Japan.
*
email: swdsth@gmail.com
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Abstract

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We present dual-frequency VLBI observations of a nearby radio galaxy NGC 4261 at 22 and 43 GHz using the East Asia VLBI Network. In particular, the first sub-pc scale image of the 22 GHz water megamaser line in the circumnuclear region of NGC 4261 is shown. Our results suggest that the megamaser emission in NGC 4261 can be associated with the inner radius of the obscuring disk, as it is proposed for the nearest radio-loud megamaser source NGC 1052. An alternative hypothesis on the megamaser association is the shock region of the interaction between the jet and ambient molecular clouds.

Keywords

galaxies: activegalaxies: nucleiradio lines: galaxies
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S380: Cosmic Masers: Proper Motion toward the Next-Generation Large Projects , December 2022 , pp. 63 - 66
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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