220 citations · 1.2k across the 39 of their papers we have counts for
3 papers · 1 filter
Does the growth of structure affect our dynamical models of the universe? The averaging, backreaction and fitting problems in cosmology
Chris Clarkson, George Ellis, Julien Larena +1
Structure occurs over a vast range of scales in the universe. Our large-scale cosmological models are coarse-grained representations of what exists, which have much less structure…
(Mis-)Interpreting supernovae observations in a lumpy universe
Chris Clarkson, George Ellis, Andreas Faltenbacher +3
Light from `point sources' such as supernovae is observed with a beam width of order of the sources' size - typically less than 1 AU. Such a beam probes matter and curvature distri…
Is backreaction really small within concordance cosmology?
Chris Clarkson, Obinna Umeh
Smoothing over structures in general relativity leads to a renormalisation of the background, and potentially many other effects which are poorly understood. Observables such as th…