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GASKAP-OH: A New Deep Survey of Ground-State OH Masers and Absorption in the Southern Sky

Published online by Cambridge University Press:  07 February 2024

J. R. Dawson Open the ORCID record for J. R. Dawson [Opens in a new window] ,
S. L. Breen  and
the GASKAP-OH Team
J. R. Dawson*
Affiliation:
School of Mathematical and Physical Sciences and Macquarie University Astrophysics and Space Technologies Research Centre, Macquarie University, NSW 2109, Australia. Australia Telescope National Facility, CSIRO Space & Astronomy, NSW 1710, Australia
S. L. Breen
Affiliation:
SKA Observatory, Jodrell Bank, Lower Withington, Macclesfield SK11 9FT, UK
*
email: joanne.dawson@mq.edu.au
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Abstract

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The Galactic ASKAP survey of OH (GASKAP-OH) is surveying the Milky Way Fourth Quadrant, the Galactic Centre, the Galactic Bulge and the Large Magellanic Cloud (LMC) in the 18-cm ground-state lines of the hydroxyl radical (OH), using Australia’s Square Kilometre Array Pathfinder (ASKAP) telescope. With an expected per-channel rms sensitivity of 36 mJy/beam in its shallowest regions, and a velocity channel width of 0.1 km s-1, GASKAP-OH is expected to discover hundreds of new star-formation and evolved star OH masers, as well as extensive absorption from quasi-thermal OH throughout the Galactic Plane. We here summarise the science goals and technical specifications of the survey, and report initial detection results from test observations. GASKAP-OH is expected to run for several years and is an open collaboration. Data products will be made available to the wider community as soon as they are verified.

Keywords

maserssurveysradio lines: ISMradio lines: stars
Type
Contributed 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. 486 - 490
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Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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