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Deep Investigation of Neutral Gas Origins (DINGO): H I stacking experiments with early science data

Rhee, J, Meyer, M, Popping, A, Bellstedt, S, Driver, SP, Robotham, ASG, Whiting, M, Baldry, IK, Brough, S, Brown, MJI, Bunton, JD, Dodson, R, Holwerda, BW, Hopkins, AM, Koribalski, BS, Lee-Waddell, K, López-Sánchez, ÁR, Loveday, J, Mahony, E, Roychowdhury, S , Rozgonyi, K and Staveley-Smith, L (2022) Deep Investigation of Neutral Gas Origins (DINGO): H I stacking experiments with early science data. Monthly Notices of the Royal Astronomical Society, 518 (3). pp. 4646-4671. ISSN 0035-8711

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We present early science results from Deep Investigation of Neutral Gas Origins (DINGO), an HI survey using the Australian Square Kilometre Array Pathfinder (ASKAP). Using ASKAP sub-arrays available during its commissioning phase, DINGO early science data were taken over ~ 60 deg2 of the Galaxy And Mass Assembly (GAMA) 23 h region with 35.5 hr integration time. We make direct detections of six known and one new sources at z < 0.01. Using HI spectral stacking, we investigate the HI gas content of galaxies at 0.04 z0.09 for different galaxy colours. The results show that galaxy morphology based on optical colour is strongly linked to HI gas properties. To examine environmental impacts on the HI gas content of galaxies, three sub-samples are made based on the GAMA group catalogue. The average HI mass of group central galaxies is larger than those of satellite and isolated galaxies, but with a lower HI gas fraction. We derive a variety of HI scaling relations for physical properties of our sample, including stellar mass, stellar mass surface density, NUV-r colour, specific star formation rate, and halo mass. We find that the derived HI scaling relations are comparable to other published results, with consistent trends also observed to ~0.5 dex lower limits in stellar mass and stellar surface density. The cosmic HI densities derived from our data are consistent with other published values at similar redshifts. DINGO early science highlights the power of HI spectral stacking techniques with ASKAP.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2022 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: astro-ph.GA; astro-ph.GA
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
SWORD Depositor: A Symplectic
Date Deposited: 25 Oct 2022 16:07
Last Modified: 16 Mar 2023 10:45
DOI or ID number: 10.1093/mnras/stac3065
URI: https://researchonline.ljmu.ac.uk/id/eprint/17924
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