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Perturbation Theory in Lemaitre-Tolman-Bondi Cosmology
The Lemaitre-Tolman-Bondi solution has received much attention as a possible alternative to Dark Energy, as it is able to account for the apparent acceleration of the Universe without any exotic matter content. However, ...
The isotropic blackbody CMB as evidence for a homogeneous universe
(American Physical Society, 2012-08-01)
The question of whether the Universe is spatially homogeneous and isotropic on the largest scales is of fundamental importance to cosmology, but has not yet been answered decisively. Surprisingly, neither an isotropic ...
Multi-Scale Perturbation Theory II: Solutions and Leading-Order Bispectrum in the $Λ$CDM Universe
(IOP Publishing, 2021-08-20)
Two-parameter perturbation theory (2PPT) is a framework designed to include the relativistic gravitational effects of small-scale nonlinear structures on the large-scale properties of the Universe. In this paper we use the ...
Observing relativistic features in large-scale structure surveys -- I: Multipoles of the power spectrum
(Oxford University Press, 2020-12)
Planned efforts to probe the largest observable distance scales in future cosmological surveys are motivated by a desire to detect relic correlations left over from inflation, and the possibility of constraining novel ...