Registration Number
0220U104501,
0120U105335
, R & D reports
Title
Manifestations of dark matter and dark energy have been observed in cosmological and astrophysical objects.
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Head
Zhdanov Valery І., Доктор фізико-математичних наук
Registration Date
19-12-2020
Organization
Taras Shevchenko National University of Kyiv
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Object of research: Early Universe, dark energy (TE) and dark matter (TM); movement test bodies; compact relativistic objects.
Purpose: Research of dynamic dark energy and dark matter, search for its manifestations in cosmology and astrophysical objects. Explanation of the differences in the definitions of the “early” and “late” Hubble constants using models of warm dark matter and dynamic dark energy.
Research methods: methods of theoretical physics and astrophysics, mathematical statistics and regression analysis, numerical modeling.
An analysis of the work is performed and a review of the problem with the Hubble constant and the corresponding modifications of the standard cosmological model in the context of this problem is prepared.
A model of dark matter in the form of a non-contact gas of massive particles has been developed.
The conditions for the particle distribution function corresponding to the given parameter are obtained Gubble, as a function of the redshift. Conditions under which relaxation is possible are found contradictions between the "early" and the "late" constant of Gubble.
A restriction on the equation of state of dark matter with a nonzero equation of state is obtained, which mitigate inconsistencies in the values of H0 in the framework of the ΛCDM model. Received corresponding estimates of the parameter of the equation of state of TM. The results of quantitative and qualitative analysis of errors by the Monte Carlo method and the influence of statistical dependences on the value of the constant Gubble in the modern era.
Possible types of distributions of stable circular orbits in spherically symmetric are classified configurations of the general theory of relativity in the presence of a scalar field with a monomial potential of amateurism. Critical curves are constructed that separate qualitatively different cases in the plane the mass-scalar charge for different degrees of potential.
Product Description
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2020-12-19
