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The Widefield ASKAP L-band Legacy All-sky Blind surveY (or WALLABY) is a major survey that is now running on the Australian SKA Pathfinder (ASKAP), which is an innovative imaging radio telescope located in an extremely radio quiet zone (the Murchison Radio-astronomy Observatory) in Western Australia. The aim of WALLABY is to use the powerful widefield phased-array technology of ASKAP to observe three-quarters of the whole sky in the 21-cm line of neutral hydrogen (or HI) at 30-arcsec resolution, thereby detecting and imaging the gas distribution in hundreds of thousands of external galaxies in the local Universe for the first time. This will allow us to gain a much improved understanding of the processes involved in galaxy formation and evolution, and the role of stellar and black hole feedback, gas accretion and galaxy interactions in these processes. Several WALLABY fields have already been observed resulting in a rich variety of science projects becoming available from 2021.

The purpose of the various surveys is to understand the evolution of the Universe, the distribution of matter and the formation of galaxies and large-scale structure. Several projects are available within the WALLABY team. Contact any of ICRAR’s WALLABY researchers about WALLABY projects. A few suggested project titles and contact people are given below:

  • The dark matter distribution in galaxies (Barbara Catinella)
  • The relationship between galaxy properties and dark matter content (Barbara Catinella)
  • Studying the angular momentum of gas disks in galaxies (Danail Obreschkow)
  • Simulating the WALLABY Universe (Claudia Lagos)
  • Interactions between galaxies and their effect on their evolution (Ivy Wong)
  • The search for dark galaxies (Lister Staveley-Smith)
  • The role of dwarf galaxies in cosmology (Bi-Qing For)
  • The search for high velocity clouds in the local Universe (Bi-Qing For)
  • Interactions of galaxies with intragroup and intracluster gas (Tristan Reynolds)
  • The HI mass function (Tobias Westmeier)
  • Detection and parameterisation algorithms (Tobias Westmeier)
  • Star formation inside and outside of galaxy discs (Ivy Wong)
  • Cosmological tests of the Lambda Cold Dark Matter model (Lister Staveley-Smith)
The Australian SKA pathfinder (ASKAP) in Western Australia is one of several world-class radio telescopes being used by ICRAR researchers

The Australian SKA pathfinder (ASKAP) in Western Australia is one of several world-class radio telescopes being used by ICRAR researchers

Associated Researchers

A/Prof Danail Obreschkow

ARC Future Fellow and Interim Head International Space Centre

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Dr Claudia Lagos

Senior Research Fellow and ASTRO 3D Fellow

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A/Prof Luca Cortese

ARC Future Fellow

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Dr Adam Stevens

Buckee Fellow

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