Search
Now showing items 1-6 of 6
Multipoles of the relativistic galaxy bispectrum
(IOP Publishing Ltd, 2020)
Above the equality scale the galaxy bispectrum will be a key probe for measuring
primordial non-Gaussianity which can help differentiate between different inflationary models
and other theories of the early universe. On ...
Hybrid P` (k): General, unified, non-linear matter power spectrum in redshift space
(IOP Publishing Ltd, 2020)
Constraints on gravity and cosmology will greatly benefit from performing joint
clustering and weak lensing analyses on large-scale structure data sets. Utilising non-linear
information coming from small physical scales ...
Non-linear damping of superimposed primordial oscillations on the matter power spectrum in galaxy surveys
(IOP Publishing Ltd, 2020)
Galaxy surveys are an important probe for superimposed oscillations on the primordial power spectrum of curvature perturbations, which are predicted in several theoretical
models of inflation and its alternatives. In order ...
Improvements in cosmological constraints from breaking growth degeneracy
(EDP Sciences, 2020)
The key probes of the growth of a large-scale structure are its rate f and amplitude σ8. Redshift space distortions in the galaxy power spectrum allow us to measure only the combination fσ8, which can be used to constrain ...
Multi-scale perturbation theory. Part I. Methodology and leading-order bispectrum corrections in the matter-dominated era
(IOP Publishing Ltd, 2020)
Two-parameter perturbation theory is a scheme tailor-made to consistently include nonlinear density contrasts on small scales (< 100 Mpc), whilst retaining a traditional
approach to cosmological perturbations in the ...
Probing beyond-Horndeski gravity on ultra-large scales
(IOP Publishing Ltd, 2020)
The beyond-Horndeski gravity has recently been reformulated in the dark energy
paradigm — which has been dubbed, Unified Dark Energy (UDE). The evolution equations
for the given UDE appear to correspond to a non-conservative ...