2001/10/30 by A. M. Aliaga, Vicent Quilis, V. Quilis +3
Physics and Astronomy · #Anisotropy #Astrophysics #COSMIC cancer database #Cold dark matter #Cosmic background radiation #Cosmic microwave background #Cosmological perturbation theory #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark matter #Non-Gaussianity #Physics #Quantum mechanics #Relativity and Gravitational Theory #Scientific Research and Discoveries #Statistical physics #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.2002.05095.x
published as Mon.Not.Roy.Astron.Soc. 330 (2002) 625 · 6 latex pages with mn.sty, 3 eps figures. Accepted in MNRAS
arxiv created 2001/10/30 · openalex publication_date 2002/03/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Non-linear evolution of cosmological energy density fluctuations triggers deviations from Gaussianity in the temperature distribution of the cosmic microwave background. A method to estimate these deviations is proposed. N-body simulations – in a Λ cold dark matter cosmology – are used to simulate the strongly non-linear evolution of cosmological structures. It is proved that these simulations can be combined with the potential approximation to calculate the statistical moments of the cosmic microwave background anisotropies produced by non-linear gravity. Some of these moments are computed and the resulting values are different from those corresponding to Gaussianity.