http://dspace.nbuv.gov.ua:80/handle/123456789/114704 2026-04-17T18:22:51Z http://dspace.nbuv.gov.ua:80/handle/123456789/119177 Centaurus A as a plausible source of ultra high energy cosmic rays registered by the Pierre Auger Observatory Sushchov, O.B.; Kobzar, O.O.; Hnatyk, B.I.; Marchenko, V.V. For ultra high energy cosmic rays events detected by the Pierre Auger Observatory which arrive from the region near Centaurus A the positions of the corresponding sources were calculated for the two chosen galactic magnetic field models. Also the influence of extragalactic magnetic field was taken into account for different energy and ultra high energy cosmic rays type to show the possibility of correlation with Centaurus A. 2012-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/119176 Results from the Pierre Auger Observatory Šmída, R. The Pierre Auger Observatory is the largest observatory of high-energy cosmic rays. It is located in Argentina and has been taking data since January 2004. Extensive air showers initiated by cosmic rays are measured by the hybrid detector, which combines the sampling of particle density at ground by water-Cherenkov tanks and the measurement of atmospheric fluorescence light by telescopes. New detection techniques, like radio and microwave measurement, are also being tested. Results regarding the energy spectrum, mass composition and arrival directions of cosmic rays are presented here. 2012-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/119175 Project of program package for exploring of cosmological fractals Lovyagin, N.Yu. The value of fractal dimension and inhomogeneity scale of the spatial distribution of galaxies is a widely discussed problem in the modern cosmology. To solve it one should carefully test the reliability of methods of determination of the values of these physical quantities. The project of a program package to explore fractal properties of isolated points (galaxies) distribution is presented. The package includes tools to load catalogues of galaxies as well as to simulate fractal and uniform distributions of points, which are used for testing applicability limits of correlation methods. 2012-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/119174 MHD waves in the plasma system with dipole magnetic field configuration Cheremnykh, S.O.; Agapitov, O. The eigenmode spectrum of the ultra low frequency (ULF) waves in the Earth magnetosphere is discrete and consists of Alfvén and slow magnetosonic modes. Their interaction depends on ionospheric conductivity and the magnetic field curvature. We present the physical conditions of resonant ULF waves realization obtained for different wave polarization types. ULF waves with poloidal polarization are strongly coupled to slow magnetohydrodynamic (MHD) waves. The magnetic field pressure oscillates with 180° phase shift with respect to the plasma pressure. Thus, for such coupled waves the partial pressure compensation is observed. The crucial influence of the background magnetic field shear on the poloidal modes is shown. The toroidal field line resonant ULF waves do not have magnetic pressure and plasma pressure perturbations. Results presented in this paper are common for the ULF waves in the Earth's magnetosphere and include different scale disturbations. The verification of the obtained conditions with parameters of waves collected in the Earth's magnetosphere ULF is carried out by use of AMPTE/CCE and Equator-S data. The good agreement is obtained. 2012-01-01T00:00:00Z