Author

Geraint F. Lewis

3 papers indexed here

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Review Oct 2026

The Cosmic Radio Dipole and Observer Effects in SKA all-sky surveys

The Square Kilometre Array (SKA) will observe our Universe on the largest scales and so enable the study of fundamental assumptions in cosmology, such as cosmic homogeneity and isotropy. Observations over recent years have reaffirmed an unexpected challenge to the Cosmological Principle first seen in measurements of th...

D. Bertacca, L. Böhme, B. B. Baldi et al. · 0 citations

Review Oct 2026

The Radius-Luminosity Relationship for Active Galactic Nuclei with Hierarchical Bayesian Reverberation Mapping

Reverberation mapping of active galactic nuclei uses the time taken for variability to travel through the system as a measure of system size, with this size being used to inform estimates of the mass of the central black hole, a technique that has graduated to an industrial-scale effort in recent decades. Such large ta...

H. McDougall, T. Davis, B. Pope et al. · 0 citations

Preprint Sep 2026

Harnessing stellar kinematics to constrain dark energy with the double-source-plane gravitational lens SDSS J0946+1006

SDSS J0946+1006 is an attractive target for measuring cosmological parameters through lens modelling. It is the best-studied galaxy-scale strong gravitational lens with multiple sources whose redshift separations are well-suited to constraining the dark energy equation of state. However, multi-plane lens models with fr...

D. Ballard, Wolfgang Enzi, Thomas E. Collett et al. · 0 citations