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astro-ph2000★ 21 cited
Global fits for the spectral index of the cosmological curvature perturbation
L. Covi, D. H. Lyth
Best-fit values of the spectral index of the curvature perturbation are presented, assuming the CDM cosmology. Apart from the spectral index, the parameters are the Hubble param…
astro-ph2000★ 857 cited
A new approach to the evolution of cosmological perturbations on large scales
David Wands, Karim A. Malik, David H. Lyth +1
We discuss the evolution of linear perturbations about a Friedmann-Robertson-Walker background metric, using only the local conservation of energy-momentum. We show that on suffici…
astro-ph2000★ 24 cited
Observational constraints on the spectral index of the cosmological curvature perturbation
David H. Lyth, Laura Covi
We evaluate the observational constraints on the spectral index , in the context of the CDM hypothesis which represents the simplest viable cosmology. We first take to be…