Cosmology with the Square Kilometre Array

Abstract

We review how the Square Kilometre Array (SKA) will address fundamental questions in cosmology, focussing on its use for neutral Hydrogen (HI) surveys. A key enabler of its unique capabilities will be large (but smart) receptors in the form of aperture arrays. We outline the likely contributions of Phase-1 of the SKA (SKA1), Phase-2 SKA (SKA2) and pathfinding activities (SKA0). We emphasise the important role of cross-correlation between SKA HI results and those at other wavebands such as: surveys for objects in the EoR with VISTA and the SKA itself; and huge optical and near-infrared redshift surveys, such as those with HETDEX and Euclid. We note that the SKA will contribute in other ways to cosmology, e.g. through gravitational lensing and $H_0$ studies.

9 pages, 1 Figure, to appear in the proceedings of "Astronomy with megastructures: Joint science with the E-ELT and SKA", 10-14 May 2010, Crete, Greece (Eds: Isobel Hook, Dimitra Rigopoulou, Steve Rawlings and Aris Karastergiou)

References in corpus (4)

• Large-Scale Structure and Future Surveys
• MESMER: MeerKAT Search for Molecules in the Epoch of Reionization
• Expanding e-MERLIN with the Goonhilly Earth Station
• The Square Kilometre Array

Cited by in corpus (6)

• Optimising Baryon Acoustic Oscillation Surveys - I: Testing the concordance LCDM cosmology
• A Technique for Weak Lensing with Velocity Maps: Eliminating Ellipticity Noise in HI Radio Observations
• Searching for modified gravity with baryon oscillations: from SDSS to wide field multiobject spectroscopy (WFMOS)
• Accurate Extra-Galactic Distances and Dark Energy: Anchoring the Distance Scale with Rotational Parallaxes
• The effect of reionization on the CMB-density correlation
• Surveying the dark side