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A sensitive search for water masers associated with star formation regions in the Local Group Galaxy NGC 6822


Flanagan, CJP and Ellingsen, SP and Cole, AA, A sensitive search for water masers associated with star formation regions in the Local Group Galaxy NGC 6822, Publications of the Astronomical Society of Australia, 39 Article e022. ISSN 1323-3580 (2022) [Refereed Article]


Copyright Statement

Copyright 2022 The Author(s). Published by Cambridge University Press on behalf of the Astronomical Society of Australia. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.1017/pasa.2022.8


We report the results of a sensitive search for water maser emission in the Local Group Galaxy NGC 6822 with the Karl G. Jansky Very Large Array. The observations provide tentative single-epoch detections of four candidates, associated with two infrared-bright star formation regions (Hubble I/III and Hubble IV). The candidate maser detections are all offset from the velocity range where strong emission from Hi neutral gas is observed towards NGC 6822, with the closest offset by ∼40kms-1. Our observations include the location of NL1K, a previous tentative water maser detection in NGC 6822. We do not detect any emission from this location with a sensitivity limit approximately a factor of 5 better than the original Sardina Radio Telescope observations.

Item Details

Item Type:Refereed Article
Keywords:masers; stars: formation; galaxies: individual (NGC 6822)
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Flanagan, CJP (Mr Conor Flanagan)
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
UTAS Author:Cole, AA (Professor Andrew Cole)
ID Code:150743
Year Published:2022
Deposited By:Office of the School of Natural Sciences
Deposited On:2022-06-27
Last Modified:2022-08-23
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