TY - JOUR
T1 - Deep investigation of neutral gas origins (DINGO) : H I stacking experiments with early science data
AU - Rhee, J.
AU - Meyer, M.
AU - Popping, A.
AU - Bellstedt, S.
AU - Driver, S. P.
AU - Robotham, A. S. G.
AU - Whiting, M.
AU - Baldry, I. K.
AU - Brough, S.
AU - Brown, M. J. I.
AU - Bunton, J. D.
AU - Dodson, R.
AU - Holwerda, B. W.
AU - Hopkins, A. M.
AU - Koribalski, Bärbel S.
AU - Lee-Waddell, K.
AU - Lopez-Sanchez, A. R.
AU - Loveday, J.
AU - Mahony, E.
AU - Roychowdhury, S.
AU - Rozgonyi, K.
AU - Staveley-Smith, L.
N1 - Publisher Copyright:
© 2022 Oxford University Press. All rights reserved.
PY - 2022
Y1 - 2022
N2 - We present early science results from Deep Investigation of Neutral Gas Origins (DINGO), an H I surv e y using the Australian Square Kilometre Array Pathfinder (ASKAP). Using ASKAP subarrays available during its commissioning phase, DINGO early science data were taken o v er ~60 deg2of the Galaxy And Mass Assembly (GAMA) 23 h region with 35.5 h integration time. We make direct detections of six known and one new sources at z < 0.01. Using H I spectral stacking, we investigate the H I gas content of galaxies at 0.04 < z < 0.09 for different galaxy colours. The results show that galaxy morphology based on optical colour is strongly linked to H I gas properties. To examine environmental impacts on the H I gas content of galaxies, three subsamples are made based on the GAMA group catalogue. The average H I mass of group central galaxies is larger than those of satellite and isolated galaxies, but with a lower H I gas fraction. We derive a variety of H I 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 H I 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 H I densities derived from our data are consistent with other published values at similar redshifts. DINGO early science highlights the power of H I spectral stacking techniques with ASKAP. K ey words: galaxies: evolution -galaxies: ISM -radio lines: galaxies.
AB - We present early science results from Deep Investigation of Neutral Gas Origins (DINGO), an H I surv e y using the Australian Square Kilometre Array Pathfinder (ASKAP). Using ASKAP subarrays available during its commissioning phase, DINGO early science data were taken o v er ~60 deg2of the Galaxy And Mass Assembly (GAMA) 23 h region with 35.5 h integration time. We make direct detections of six known and one new sources at z < 0.01. Using H I spectral stacking, we investigate the H I gas content of galaxies at 0.04 < z < 0.09 for different galaxy colours. The results show that galaxy morphology based on optical colour is strongly linked to H I gas properties. To examine environmental impacts on the H I gas content of galaxies, three subsamples are made based on the GAMA group catalogue. The average H I mass of group central galaxies is larger than those of satellite and isolated galaxies, but with a lower H I gas fraction. We derive a variety of H I 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 H I 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 H I densities derived from our data are consistent with other published values at similar redshifts. DINGO early science highlights the power of H I spectral stacking techniques with ASKAP. K ey words: galaxies: evolution -galaxies: ISM -radio lines: galaxies.
UR - https://hdl.handle.net/1959.7/uws:77103
M3 - Article
SN - 0035-8711
VL - 518
SP - 4646
EP - 4671
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -