Cosmology with Phase 1 of the Square Kilometre Array; Red Book 2018: Technical specifications and performance forecasts
Abstract
We present a detailed overview of the cosmological surveys that will be carried 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 sqdeg; a wide and deep continuum galaxy and HI intensity mapping survey over 20,000 sqdeg from z = 0.35 - 3; and a deep, high-redshift HI intensity mapping survey over 100 sqdeg from z = 3 - 6. Taken together, these surveys will achieve an array of important scientific goals: measuring the equation of state of dark energy out to z ~ 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 surveys like LSST and Euclid, 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.
Keywords
Cite
@article{arxiv.1811.02743,
title = {Cosmology with Phase 1 of the Square Kilometre Array; Red Book 2018: Technical specifications and performance forecasts},
author = {Square Kilometre Array Cosmology Science Working Group and David J. Bacon and Richard A. Battye and Philip Bull and Stefano Camera and Pedro G. Ferreira and Ian Harrison and David Parkinson and Alkistis Pourtsidou and Mario G. Santos and Laura Wolz and Filipe Abdalla and Yashar Akrami and David Alonso and Sambatra Andrianomena and Mario Ballardini and Jose Luis Bernal and Daniele Bertacca and Carlos A. P. Bengaly and Anna Bonaldi and Camille Bonvin and Michael L. Brown and Emma Chapman and Song Chen and Xuelei Chen and Steven Cunnington and Tamara M. Davis and Clive Dickinson and Jose Fonseca and Keith Grainge and Stuart Harper and Matt J. Jarvis and Roy Maartens and Natasha Maddox and Hamsa Padmanabhan and Jonathan R. Pritchard and Alvise Raccanelli and Marzia Rivi and Sambit Roychowdhury and Martin Sahlen and Dominik J. Schwarz and Thilo M. Siewert and Matteo Viel and Francisco Villaescusa-Navarro and Yidong Xu and Daisuke Yamauchi and Joe Zuntz},
journal= {arXiv preprint arXiv:1811.02743},
year = {2020}
}
Comments
Red Book 2018 of the Square Kilometre Array Cosmology Science Working Group; 35 pages, 27 figures; To be submitted to PASA