9 papers
Overview: Cosmology with the SKAO
Marta Spinelli, Ian Harrison, Richard A. Battye +5
The SKA telescopes will revolutionise our ability to do cosmology at radio wavelengths, via both their own data and in synergy with other wavelengths. SKAO will be the first instru…
Limits on global cosmic birefringence using radio sources
Richard A. Battye, Neal Jackson, Ian Browne
We have made measurements of the difference between the position angle (PA) on the sky and the polarization position angle (PPA) of radio sources using data from a combination of t…
Spectrum of radiation from global strings and the relic axion density
Richard A. Battye, Lukasz P. Bunio, Steven J. Cotterill +1
We discuss key aspects of the nature of radiation from global strings and its impact on the relic axion density. Using a simple model we demonstrate the dependence on the spectrum…
How isotropic is dark energy?
Richard A. Battye, Adam Moss
Tensions in late-time expansion data have renewed interest in models beyond CDM. We ask: \emph{how isotropic must dark energy be?} Working in Bianchi~I, we allow time-dependent…
The Simons Observatory: forecasted constraints on primordial gravitational waves with the expanded array of Small Aperture Telescopes
The Simons Observatory Collaboration, I. Abril-Cabezas, S. Adachi +479
We present updated forecasts for the scientific performance of the degree-scale (0.5 deg FWHM at 93 GHz), deep-field survey to be conducted by the Simons Observatory (SO). By 2027,…
Complete Classification of Domain Wall Solutions in the -symmetric 2HDM
Richard A. Battye, Steven J. Cotterill, Adam K. Thomasson
We present a complete classification of domain wall solutions in the two-Higgs Doublet Model (2HDM) with a global symmetry, categorised as superconducting, CP-violat…