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Registration Number

0216U005543, 0113U003059 , R & D reports

Title

Hidden components and evolutionary stages of formation of large scale structure of the Universe, galaxies, stars and supernovae remnants.

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Head

Novosyadlyj Bogdan Stepanovych,

Registration Date

03-02-2016

Organization

Ivan Franko National University of Lviv

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From the NSVS catalog we selected the sample consisting of 65 stars with the elliptical type of variability (ELL) for which the search for stellar-mass black holes is possible when the data of the space X-ray telescopes observations are additionally used. The Vela supernova remnant was modeled within the framework of the new hydrodynamical model that assumes the supernova explosion at the edge of the stellar wind bubble. The gamma-gamma absorption of gamma-radiation from blazars and the binary PSR B1259-63/LS 2883 were studied. The modification of the halo model of galaxy formation for calculation of the power spectra of dark and baryon matter at small scales was developed. The best-fit values and confidence limits for the parameters of dynamical dark energy with barotropic equation of state and for other cosmological parameters were determined on the basis of datasets including WMAP9 or Planck-2013 results on CMB anisotropy. It is shown that the reconstruction of Lagrangian for the scalar field dark energy with variable in time equation of state parameter and constant effective sound speed is possible only with accuracy up to an arbitrary constant. The behavior of dark energy in the gravitational fields of stars and black holes with the Schwarzschild metric was analyzed. It is shown that in the case of stars the static solution of the differential equations for energy-momentum conservation exists and describes the distribution of density of dark energy inside and outside of a star. The power spectra of anisotropy of the neutral Hydrogen absorption line 21 cm in the Dark ages were computed for different models of decaying dark matter and dynamical dark energy at different redshifts and for different window functions. The developed new method of compilation and characterization of composite spectra of quasars is more precise than other existing ones and allows to control better the uncertainties.

Product Description

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Апуневич Степан Євгенійович
Касеркевич Валерій Станіславович
Кулініч Юрій Анатолійович
Новосядлий Богдан Степанович
Сергієнко Ольга Миколаївна

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2020-04-02