Speaker
Prof.
Geraint Lewis
(The University of Sydney)
Description
I will present our recent results exploring the integrity of the cosmological principle, the idea that, on sufficient scales, the universe is homogeneous and isotropic. Recent tensions have arisen between the dipole of cosmological sources and its interpretation from the CMB as a kinematic departure from the local Hubble Flow, bringing the cosmological principle into doubt. With a Bayesian-based approach, I explore the cosmological dipole in optical/IR catalogues of quasars, using Bayesian evidence to assess differing hypotheses. The conclusion is, that whilst the picture is not completely clear, the results support the veracity of the cosmological principle.
Primary author
Prof.
Geraint Lewis
(The University of Sydney)
