2007/12/27 by Marek Szydłowski, M. Szydlowski, W. Godlowski +6
Physics and Astronomy · #Astrophysics (astro-ph) #Atomic and Subatomic Physics Research #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.0712.4232
submitt in proceedings "Matter and Energy in the Universe: From Nucleosynthesis to Cosmology" 20-26 May 2007 XIX Rencontres de Blois
arxiv created 2007/12/27 · openalex publication_date 2007/12/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The contemporary cosmic expansion is considered in the context of Modified Friedmann Dynamics (MOFD). We discuss some relativistic model exploring analogy to MOND modification of Newtonian dynamics. We argue that MOFD cosmologies can explain fraction of dark matter in the accelerating Universe. We discuss some observational constraints on possible evolutional MOFD scenarios of cosmological models coming from SN Ia distant supernovae. We show that Modified Newtonian Dynamics can be obtained as a Newtonian limit of more general relativistic models with polytropic component of Equation of State. They constitute a special subclass of generalized Cardassian models basing on generalization of the Raychaudhuri equation rather than on generalization of the Friedmann first integral. We demonstrate that MOND cosmologies are compatible with observed accelerated phase of expansion of current universe only for high value of cosmological constant. The Bayesian framework of model selection favored this model over ΛCDM model if Ωm,o is fixed but this evidence is not significant. Moreover obtained from statistical analysis value of the MOND characteristic β parameter is far from value required for explanation of the flat rotation curves of spiral galaxies.