Cosmology with Phase 1 of the Square Kilometre Array: Red Book 2018: Technical specifications and performance forecasts
David J. Bacon
(1)
,
Richard A. Battye
(2)
,
Philip Bull
(3)
,
Stefano Camera
(2, 4, 5, 6)
,
Pedro G. Ferreira
(7)
,
Ian Harrison
(2, 7)
,
David Parkinson
(8)
,
Alkistis Pourtsidou
(3)
,
Mário G. Santos
(9)
,
Laura Wolz
(10)
,
Filipe Abdalla
(11)
,
Yashar Akrami
(12)
,
David Alonso
(7)
,
Sambatra Andrianomena
(9)
,
Mario Ballardini
(9)
,
José Luis Bernal
(13)
,
Daniele Bertacca
(14)
,
Carlos A.P. Bengaly
(9)
,
Anna Bonaldi
(15)
,
Camille Bonvin
(16)
,
Michael L. Brown
(2)
,
Emma Chapman
(17)
,
Song Chen
(9)
,
Xuelei Chen
(18)
,
Steven Cunnington
(1)
,
Tamara M. Davis
(19)
,
Clive Dickinson
(2)
,
José Fonseca
(9)
,
Keith Grainge
(2)
,
Stuart Harper
(2)
,
Matt J. Jarvis
(8)
,
Roy Maartens
(1)
,
Natasha Maddox
(20)
,
Hamsa Padmanabhan
(21)
,
Jonathan R. Pritchard
(17)
,
Alvise Raccanelli
(13)
,
Marzia Rivi
(11)
,
Sambit Roychowdhury
(2)
,
Martin Sahlén
(22)
,
Dominik J. Schwarz
(23)
,
Thilo M. Siewert
(23)
,
Matteo Viel
(24)
,
Francisco Villaescusa-Navarro
(25)
,
Yidong Xu
(18)
,
Daisuke Yamauchi
(26)
,
Joe Zuntz
(27)
1
ICG -
Institute of Cosmology and Gravitation [Portsmouth]
2 JBCA - Jodrell Bank Centre for Astrophysics
3 QMUL - Queen Mary University of London
4 UNITO - Università degli studi di Torino = University of Turin
5 INFN, Sezione di Torino - Istituto Nazionale di Fisica Nucleare, Sezione di Torino
6 OATo - INAF - Osservatorio Astrofisico di Torino
7 Department of Physics [Oxford]
8 KASI - Korea Astronomy and Space Science Institute
9 UWC - University of the Western Cape
10 University of Melbourne
11 UCL - University College of London [London]
12 Astrophysique
13 ICCUB - Institut de Ciencies del Cosmos
14 AlfA - Argelander-Institut für Astronomie
15 SKA Organization, Lower Withington Macclesfield
16 UNIGE - Université de Genève = University of Geneva
17 Imperial College London
18 NAOC - National Astronomical Observatories [Beijing]
19 UQ [All campuses : Brisbane, Dutton Park Gatton, Herston, St Lucia and other locations] - The University of Queensland
20 ASTRON - Netherlands Institute for Radio Astronomy
21 ETH Zürich - Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich]
22 Uppsala Universitet [Uppsala]
23 Universität Bielefeld = Bielefeld University
24 SISSA / ISAS - Scuola Internazionale Superiore di Studi Avanzati / International School for Advanced Studies
25 Center for Computational Astrophysics [New York]
26 Kanagawa University
27 Edin. - University of Edinburgh
2 JBCA - Jodrell Bank Centre for Astrophysics
3 QMUL - Queen Mary University of London
4 UNITO - Università degli studi di Torino = University of Turin
5 INFN, Sezione di Torino - Istituto Nazionale di Fisica Nucleare, Sezione di Torino
6 OATo - INAF - Osservatorio Astrofisico di Torino
7 Department of Physics [Oxford]
8 KASI - Korea Astronomy and Space Science Institute
9 UWC - University of the Western Cape
10 University of Melbourne
11 UCL - University College of London [London]
12 Astrophysique
13 ICCUB - Institut de Ciencies del Cosmos
14 AlfA - Argelander-Institut für Astronomie
15 SKA Organization, Lower Withington Macclesfield
16 UNIGE - Université de Genève = University of Geneva
17 Imperial College London
18 NAOC - National Astronomical Observatories [Beijing]
19 UQ [All campuses : Brisbane, Dutton Park Gatton, Herston, St Lucia and other locations] - The University of Queensland
20 ASTRON - Netherlands Institute for Radio Astronomy
21 ETH Zürich - Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich]
22 Uppsala Universitet [Uppsala]
23 Universität Bielefeld = Bielefeld University
24 SISSA / ISAS - Scuola Internazionale Superiore di Studi Avanzati / International School for Advanced Studies
25 Center for Computational Astrophysics [New York]
26 Kanagawa University
27 Edin. - University of Edinburgh
Résumé
We present a detailed overview of the cosmological surveys that we aim to carry out with Phase 1 of the Square Kilometre Array (SKA1) and the science that they will enable. We highlight three main surveys: a medium-deep continuum weak lensing and low-redshift spectroscopic HI galaxy survey over 5 000 deg2; a wide and deep continuum galaxy and HI intensity mapping (IM) survey over 20 000 deg2 from $z = 0.35$ to 3; and a deep, high-redshift HI IM survey over 100 deg2 from $z = 3$ to 6. Taken together, these surveys will achieve an array of important scientific goals: measuring the equation of state of dark energy out to $z \sim 3$ with percent-level precision measurements of the cosmic expansion rate; constraining possible deviations from General Relativity on cosmological scales by measuring the growth rate of structure through multiple independent methods; mapping the structure of the Universe on the largest accessible scales, thus constraining fundamental properties such as isotropy, homogeneity, and non-Gaussianity; and measuring the HI density and bias out to $z = 6$ . These surveys will also provide highly complementary clustering and weak lensing measurements that have independent systematic uncertainties to those of optical and near-infrared (NIR) surveys like Euclid, LSST, and WFIRST leading to a multitude of synergies that can improve constraints significantly beyond what optical or radio surveys can achieve on their own. This document, the 2018 Red Book, provides reference technical specifications, cosmological parameter forecasts, and an overview of relevant systematic effects for the three key surveys and will be regularly updated by the Cosmology Science Working Group in the run up to start of operations and the Key Science Programme of SKA1.