Registration Number
0224U031754,
0122U001865
, R & D reports
Title
Relativistic gravity, dark matter and dark energy in extragalactic and cosmological objects
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Head
Parnovskyi Serhii L., Доктор фізико-математичних наук
Registration Date
11-06-2024
Organization
Taras Shevchenko National University of Kyiv
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The accuracy of obtaining cosmological parameters based on the observation of gravitational waves by the future LISA space observatory is estimated. They will be able to be used as a cosmological test by the method of standard sirens to determine the Hubble constant and the deceleration parameter. Both bright (massive double black holes) and dark sirens (double black holes of stellar origin, orbital convergences with an extreme mass ratio), i.e., sources of strong gravitational wave radiation, are considered. It is shown that LISA data, together with data from other gravitational-wave and electromagnetic observatories, will be able to limit the value of the Hubble constant to an accuracy level of a few percent, but for the determination of the deceleration parameter, they will not allow achieving a competitive level of accuracy. A limit on the content of primordial black holes was obtained. The most complete database of existing observational constraints on the content of primordial black holes as dark matter has been created. Static spherically symmetric isolated configurations with a scalar field and within the framework of an alternative theory of gravity were investigated. Observational manifestations of F(R) gravity in the Universe were studied. The dust temperature in galaxies with active star formation is estimated based on mid-infrared observations from the WISE space mission. The effect of power spectrum suppression in cosmological N-particle simulations of warm dark matter is demonstrated. A model of the formation of galaxies due to the capture of dark matter particles flying through excess density is proposed, which is related to the theory of catastrophes. Observed manifestations of the anisotropy of the universe have been studied. Modern astronomical observations do not find similar effects.
Product Description
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Izotova Iryna Yu.
Zhdanov Valerii І.
Serhiienko Olha M.
Shtаnov Yurii V.
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2024-06-11
