Registration Number
0221U106036,
0120U104854
, R & D reports
Title
Light dark matter and dynamical dark energy in the Universe
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Head
Shtanov Yurii V., Доктор фізико-математичних наук
Registration Date
27-09-2021
Organization
М.М.Bogolyubov Institute of Theoretical Physics of the National Academy of Sciences of Ukraine
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Physical effects and artifacts of thermal velocities in N-body cosmological simulations of warm dark matter are calculated. Analysis of rotation curves of a sample of galaxies from the SPARC database is carried out. The parameters of the density profile of dark matter in the Virgo cluster are estimated. A new scenario is proposed in which the scalaron of the f(R) gravity theory plays the role of light dark matter. A braneworld model was tested by cosmological observations for consistency with the measurements of the Hubble constant. A method for determining the scalar field potentials that provide a given dependence H(z) was developed. For spherically symmetric static configurations with a scalar field, an image of a thin accretion disk with different types of stable circular orbits is constructed. Qualitative properties of the solutions of Einstein equations for a homogeneous Bianchi type I model with an arbitrary barotropic equation of state of dark matter and dark energy are determined. Thermodynamical properties of the system of interacting bosons are investigated.
Product Description
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Zhdanov Valerii I.
Parnovsky Sergei L.
Rudakovskyi Anton V.
Savchenko Denys O.
Stashko Oleksandr S.
Khelashvili Mariia V.
Shtаnov Yurii V.
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2021-09-27
