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Information × Registration Number 0213U002255, 0112U005006 , R & D reports Title Development of models of the Universe with cosmological fields, models of dark energy, investigation of dank energy effect on the Universe evolution. Stage 3. Investigation of the evolution of density perturbations in multicomponent models of the Universe with dark energy and dynamic motion of high-energy particles in gravitational and magnetic fields. popup.stage_title Head Pelykh Volodymyr, Доктор фізико-математичних наук Registration Date 23-01-2013 Organization Pidstryhach Institute of Applied Problems of Mechanics and Mathematics NAS of Ukraine popup.description2 The dynamics of expansion and formulation of large-scale structure of the Universe in cosmological models with quintessence and phantom scalar field with a barotropic equation of state has been studied. The quintecentional scalar field with decreasing parameter of equation of state develops from dynamic field into the early age with decreasing energy density, to a racuum-line one with and eternal exponential expansion. The quintecentional scalar field with increasing parameter in the future will cause expansion stop, compression and attainment of singularity Big Crunch during a finite time. The phantom field with a barotropic equation of state ( increases with time) at first mimicrates A constant and in the future causes evolution of the Universe up to singularity Big Rip. Using the Monte-Carlo method of Markivskii chain the most optimal values of parameters of cosmological model and parameters of scalar field for two experimental data sets have been found. The existence of the most optimal models both with quintecentional and phantom scalar field with statistically negligible difference of the values has been established. The detected degeneracy of models needs to be verified on the basis ofrmodelled synthetic data on the one hand and on the other hand it demands that new cosmological and astrophysical dark energy sensitive tests be looked for. Product Description popup.authors Бешлей В.В. Гнатик Б.І. Кулініч Ю.А. Нікітін А.Г. Новосядлий Б.С. Пелих В.О. Петрук О.Л. Пляцко Р.М. Сергієнко О.М. popup.nrat_date 2020-04-02 Close