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

C. J.P. Flanagan; S. P. Ellingsen; A. A. Cole

doi:10.1017/pasa.2022.8

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

C. J.P. Flanagan, S. P. Ellingsen, A. A. Cole

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Abstract

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 Formula Presented. 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.

Original language	English
Article number	e022
Journal	Publications of the Astronomical Society of Australia
Volume	39
DOIs	https://doi.org/10.1017/pasa.2022.8
Publication status	Published - 19 May 2022
Externally published	Yes

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10.1017/pasa.2022.8Licence: CC BY

Cite this

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

abstract = "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 Formula Presented. 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.",

keywords = "galaxies: individual (NGC 6822), masers, stars: formation",

author = "Flanagan, {C. J.P.} and Ellingsen, {S. P.} and Cole, {A. A.}",

note = "Publisher Copyright: {\textcopyright} The Author(s), 2022. Published by Cambridge University Press on behalf of the Astronomical Society of Australia",

year = "2022",

month = may,

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doi = "10.1017/pasa.2022.8",

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TY - JOUR

T1 - A sensitive search for water masers associated with star formation regions in the Local Group Galaxy NGC 6822

AU - Flanagan, C. J.P.

AU - Ellingsen, S. P.

AU - Cole, A. A.

N1 - Publisher Copyright: © The Author(s), 2022. Published by Cambridge University Press on behalf of the Astronomical Society of Australia

PY - 2022/5/19

Y1 - 2022/5/19

N2 - 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 Formula Presented. 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.

AB - 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 Formula Presented. 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.

KW - galaxies: individual (NGC 6822)

KW - masers

KW - stars: formation

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U2 - 10.1017/pasa.2022.8

DO - 10.1017/pasa.2022.8

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JO - Publications of the Astronomical Society of Australia

JF - Publications of the Astronomical Society of Australia

M1 - e022

ER -

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

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