Journal article

WALLABY early science - I. The NGC 7162 galaxy group

TN Reynolds, T Westmeier, L Staveley-Smith, A Elagali, BQ For, D Kleiner, BS Koribalski, K Lee-Waddell, JP Madrid, A Popping, J Rhee, M Whiting, OI Wong, LJM Davies, S Driver, A Robotham, JR Allison, G Bekiaris, JD Collier, G Heald Show all

Monthly Notices of the Royal Astronomical Society | Published : 2019

Abstract

We present 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. We use archival HIPASS and Australia Telescope Compact Array (ATCA) observations of this group to validate the new ASKAP data and the data reduction pipeline ASKAPSOFT. We detect six galaxies in the neutral hydrogen (H I) 21-cm line, expanding the NGC 7162 group membership from four to seven galaxies. Two of the new detections are also the first H I detections of the dwarf galaxies, AM 2159-434 and GALEXASC J220338.65-431128.7, for which we have measured velocities of cz = 2558 and cz = 2727 km s..

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University of Melbourne Researchers

Grants

Awarded by National Science Foundation


Funding Acknowledgements

This research was conducted by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO3D), through project number CE170100013. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. The Australia Telescope Compact Array and Parkes radio telescope are part of the Australia Telescope National Facility that is funded by the Australian Government for operation as a National Facility managed by the Commonwealth Scientific and Industrial Research Organisation (CSIRO). This paper includes archived data obtained through the Australia Telescope Online Archive (http://atoa.atnf.csiro.au). The Australian Square Kilometre Array Pathfinder is part of the Australia Telescope National Facility, which is managed by the Commonwealth Scientific and Industrial Research Organisation. Operation of the Australian Square Kilometre Array Pathfinder is funded by the Australian Government with support from the National Collaborative Research Infrastructure Strategy. The Australian Square Kilometre Array Pathfinder uses the resources of the Pawsey Supercomputing Centre. Establishment of the Australian Square Kilometre Array Pathfinder, the Murchison Radio-astronomy Observatory (MRO), and the Pawsey Supercomputing Centre are initiatives of the Australian Government, with support from the Government of Western Australia and the Science and Industry Endowment Fund. We acknowledge the Wajarri Yamatji, as the traditional owners of the Observatory site. We also thank the Murchison Radio-Observatory site staff.This work is based in part on observations made with the Galaxy Evolution Explorer (GALEX). The Galaxy Evolution Explorer is a National Aeronautics and Space Administration (NASA) Small Explorer, whose mission was developed in cooperation with the Centre National d'Etudes Spatiales (CNES) of France and the Korean Ministry of Science and Technology. The Galaxy Evolution Explorer is operated for the National Aeronautics and Space Administration by the California Institute of Technology under the National Aeronautics and Space Administration contract NAS5-98034.This project used public archival data from the Dark Energy Survey (DES). Funding for the Dark Energy Survey Projects has been provided by the US Department of Energy, the US National Science Foundation, the Ministry of Science and Education of Spain, the Science and Technology Facilities Council of the United Kingdom, the Higher Education Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, the Center for Cosmology and Astro-Particle Physics at the Ohio State University, the Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University, Financiadora de Estudos e Projetos, Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico and the Ministerio da Ciencia, Tecnologia e Inovacao, the Deutsche Forschungsgemeinschaft, and the Collaborating Institutions in the DES.The Collaborating Institutions are Argonne National Laboratory, the University of California at Santa Cruz, the University of Cambridge, Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas-Madrid, the University of Chicago, University College London, the DES-Brazil Consortium, the University of Edinburgh, the Eidgenossische Technische Hochschule (ETH) Zurich, Fermi National Accelerator Laboratory, the University of Illinois at Urbana-Champaign, the Institut de Ciencies de l'Espai (IEEC/CSIC), the Institut de \Fisica d'Altes Energies, Lawrence Berkeley National Laboratory, the Ludwig-Maximilians University at Munchen and the associated Excellence Cluster Universe, the University of Michigan, the National Optical Astronomy Observatory, the University of Nottingham, The Ohio State University, the OzDES Membership Consortium, the University of Pennsylvania, the University of Portsmouth, SLAC National Accelerator Laboratory, Stanford University, the University of Sussex, and Texas A&M University.