2005/03/31 by S. Sarkar, Subir Sarkar · 7 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmic background radiation #Cosmic microwave background #Cosmological perturbation theory #Cosmology #Cosmology and Gravitation Theories #Dark energy #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Perturbation (astronomy) #Planck #Spectral density #astro-ph #hep-ph
paper · pdf · doi:10.1016/j.nuclphysbps.2005.04.044
published in Nuclear Physics B - Proceedings Supplements 148, 1-6 (Elsevier BV) · 6 pages, 4 figures; Talk at Workshop on `The Density Perturbation in the Universe', Athens, June 2004 (references added, no change in text)
arxiv created 2005/04/01 · openalex publication_date 2005/05/24 · arxiv updated 2011/02/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Precision measurements of anisotropies in the cosmic microwave background and of the clustering of large-scale structure have supposedly confirmed that the primordial density perturbation has a (nearly) scale-invariant spectrum. However this conclusion is based on assumptions about the world model and the nature of the dark matter. Physical models of inflation suggest that the spectrum may not in fact be scale-free, which would imply rather different cosmological parameters on the basis of the same observational data.