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Cosmological Surveys with the Australian Square Kilometre Array Pathfinder

Part of: Australian SKA Pathfinder

Published online by Cambridge University Press:  02 January 2013

A. R. Duffy ,
A. Moss  and
L. Staveley-Smith
A. R. Duffy*
Affiliation:
ICRAR, The University of Western Australia, M468, 35 Stirling Hwy, WA 6009, Australia
A. Moss
Affiliation:
Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC, V6T 1Z1, Canada
L. Staveley-Smith
Affiliation:
ICRAR, The University of Western Australia, M468, 35 Stirling Hwy, WA 6009, Australia
*
CCorresponding author. Email: alan.duffy@icrar.org
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Abstract

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This is a design study into the capabilities of the Australian Square Kilometre Array Pathfinder in performing a full-sky low redshift neutral hydrogen survey, termed WALLABY, and the potential cosmological constraints one can attain from measurement of the galaxy power spectrum. We find that the full sky survey will likely attain 6 × 105 redshifts which, when combined with expected Planck CMB data, will constrain the Dark Energy equation of state to 20%, representing a coming of age for radio observations in creating cosmological constraints.

Keywords

(cosmology): cosmological parametersgalaxies: statisticsmethods: numericalradio lines: galaxiestelescopes
Type
Regular Papers
Information
Publications of the Astronomical Society of Australia , Volume 29 , Issue 2 , 2012 , pp. 202 - 211
Copyright
Copyright © Astronomical Society of Australia 2012

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