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23rd of January 2019
ASKAP images of the NGC 7232 galaxy group (Part 3)
by Karen Lee-Waddell
Lee-Waddell et al. (2019) have used the Australian Square Kilometre Array Pathfinder (ASKAP) to detect HI in the NGC 7232 galaxy group. The observations were taken on behalf of WALLABY (the Widefield ASKAP L-band Legacy All-sky Blind surveY) using 12 ASKAP antennas during various commissioning and Early Science phases of the array. ASKAP total HI intensity contours superimposed on DSS2 optical images (left panels) and ASKAP HI velocity maps (right panels) of individual galaxies located in the NGC 7232 group. Five of these galaxies have been newly detected in HI by ASKAP. These maps are a testament of ASKAP’s ability - even during the early stages of the array - to produce wide-field images with the spatial and spectral resolution required to detect and possibly resolve low-mass HI features.

Reference: K. Lee-Waddell, B.S. Koribalski, T. Westmeier, A. Elagali, B.-Q. For, D. Kleiner, J.P. Madrid, A. Popping, T. N. Reynolds, J. Rhee, P. Serra, L. Shao, L. Staveley-Smith, J. Wang, M.T. Whiting, O.I. Wong, J.R. Allison, S. Bhandari, J.D. Collier, G. Heald, J. Marvil, S.M. Ord, 2019, MNRAS, in press (arXiv:1901.00241)

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