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20th of November 2018
WALLABY Early Science results
by Tristan Reynolds
Reynolds et al. have presented Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY) early science results from the Australian Square Kilometre Array Pathfinder (ASKAP) observations of the NGC 7162 galaxy group. They detect six galaxies in the neutral hydrogen (H I) 21-cm line, expanding the NGC 7162 group membership from four to seven galaxies. The figure above shows a Digitized Sky Survey optical image with overlaid ASKAP (blue) and HIPASS (purple) contours. The ASKAP primary beams from the A (green dashed circles) and B (magenta dotted circles) footprints are shown, along with the archival ATCA observation primary beam (orange solid circle). The postage stamps show Dark Energy Survey images of each galaxy detected with ASKAP with integrated intensity contours overlaid from ASKAP (blue) and if observed with ATCA (grey). The solid orange ellipse in the lower left corner shows the ASKAP synthesised beam and the empty black ellipse shows the ATCA synthesised beam. Full results are published in the Monthly Notices of the Royal Astronomical Society

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