Cosmological surveys with the Australian Square Kilometre Array Pathfinder

Details Cosmological surveys with the Australian Square Kilometre Array Pathfinder Cosmological surveys with the Australian Square Kilometre Array Pathfinder

2011-03-21

arxiv.org/abs/1103.3944v3

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 6 figures, accepted in PASA, updated to match published version

Scientific paper

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 0.6 million 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.

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