2001/04/30 by Roberto Trotta, R. Trotta, Alain Riazuelo +3 · 69 citations
Physics and Astronomy · #Adiabatic process #Anisotropy #Astrophysics #Cosmic background radiation #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Inflation (cosmology) #Particle physics #Physics #Quantum mechanics #Range (aeronautics) #Relativity and Gravitational Theory #Theoretical physics #Universe #astro-ph #gr-qc #hep-ph
paper · pdf · open access · doi:10.1103/physrevlett.87.231301
published in Physical Review Letters 87(23), 231301 (American Physical Society) · 4 pages, 5 figures, submitted to PRL; Major changes following referees suggestions; the allowed cosmological parameter range enlarges dramatically
arxiv created 2001/07/19 · openalex publication_date 2001/11/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In the light of the recent high quality data of the cosmic microwave background anisotropies, several estimations of cosmological parameters have been published. We study to what extent these estimations depend on assumptions about the initial conditions of the cosmological perturbations, which are usually supposed to be adiabatic. We show that, for more generic initial conditions, not only the best fit values are very different but the allowed parameter range enlarges dramatically. This raises the question which cosmological information (matter content of the Universe vs physics of inflation) can be reliably extracted from these data.