Beyond CDM with the SKA Observatory -- II: Unveiling the Secrets of the Early Universe

arXiv:2607.08593 · astro-ph.CO · Submitted 2026-07-09 · Read on arXiv

José Fonseca, Benedict Bahr-Kalus, Mario Ballardini, Matilde Barberi-Squarotti, Steven Cunnington, Sêcloka L. Guedezounme, Dionysios Karagiannis, Samantha J. Rossiter, Ziad Sakr, Cora Uhlemann, Stefano Camera, Bikash R. Dinda, Cláudio Gomes, Roy Maartens, Mário G. Santos

astro-ph.CO

Submitted: 2026-07-09

Comments: Published in Advancing Astrophysics with the SKAII (AASKAII), 2026 (arXiv:2606.20366). AASKAII/Fonseca01. Advancing Astrophysics with the SKA II (AASKAII) outlines the transformative scientific advances that will be enabled by the SKA telescopes

License: http://creativecommons.org/licenses/by-sa/4.0/

The gist: The origins of the universe remain one of the biggest mysteries in modern cosmology.

Terminology

Bispectrum — 33× in this paper · explained in 3 episodes
Non-Gaussianity — 18× in this paper · explained in 2 episodes
Primordial non-Gaussianity — 13× in this paper · explained in 2 episodes
Intensity Mapping — 12× in this paper
Clustering — 9× in this paper · explained in 2 episodes
Degeneracy — 5× in this paper · explained in 3 episodes
Adam — 2× in this paper · explained in 2 episodes
Cosmic Microwave Background — 2× in this paper
Square Kilometre Array Observatory — 2× in this paper
Consistency — 1× in this paper · explained in 3 episodes
Cooperation — 1× in this paper · explained in 2 episodes
Higher-order derivatives — 1× in this paper · explained in 2 episodes
Higher-order statistics — 1× in this paper · explained in 2 episodes
Matter Power Spectrum — 1× in this paper · explained in 2 episodes
Reheating — 1× in this paper · explained in 2 episodes
Robustness — 1× in this paper · explained in 5 episodes
Weak Lensing — 1× in this paper · explained in 2 episodes

Abstract

The origins of the universe remain one of the biggest mysteries in modern cosmology. While the Planck satellite has provided a wealth of information about the early universe, there is still much to be discovered. The Square Kilometre Array Observatory (SKAO) offers a unique opportunity to probe the universe's infancy, going beyond the current limitations of our knowledge. By measuring the power spectrum of biased tracers of the dark matter distribution on the largest cosmological scales and exploring beyond 2-point statistics, SKAO will enable us to refine our understanding of the primordial universe, including the shape of the inflationary power spectrum and the presence of primordial non-Gaussianity. In this chapter we will review recent works looking at the potential of SKAO's surveys, and how synergies with other surveys can revolutionize our understanding of the origins of the cosmos.

Beyond CDM with the SKA Observatory -- II: Unveiling the Secrets of the Early Universe

Terminology

Abstract

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