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Information × Registration Number 0224U000874, 0121U109919 , R & D reports Title High-energy processes and manifestations of new physics in astrophysical gamma sources: Ukraine's contribution to STA popup.stage_title Head Ponomarenko Vasyl O., Кандидат фізико-математичних наук Registration Date 14-01-2024 Organization Taras Shevchenko National University of Kyiv popup.description2 Object of research: Remnants of Supernovae, pulsars, magnetars, clusters and superclusters of galaxies, active galactic nuclei (AGN). Purpose of the work: improvement of existing and development of new models of gamma radiation generation (TeV) of astrophysical objects included in key scientific projects of CTA, and, based on them, justification of the strategy and predictive assessment of the results of their observations on the CTAO. Research methods: methods of theoretical astrophysics and mathematical statistics, numerical modeling, and experimental methods of recording electromagnetic all-wave radiation from astronomical objects. As part of the CTA collaboration, an algorithm for setting limits on dark matter parameters based on the data of observations of a cluster of galaxies gamma radiation and calculated limits on dark matter in the Perseus cluster was developed and implemented by software. New characteristics of the Tycho supernova remnant were obtained from their observations by the Fermi-LAT space mission in the GeV range. An assessment of the gamma-ray fluxes of the Tycho supernova remnant in the TeV range was carried out and the possibility of detecting these fluxes by Cherenkov telescopes of the CTA project was assessed. The three-dimensional structure of the flow velocity in the Tycho Brahe supernova remnant and gamma flows from it were determined. Using our own photometric observations of the active nuclei of galaxies 1ES 1426+428, BL Lacertae, Mrk 501 in the optical range, brightness changes in BVRI filters were detected and the mechanisms of brightness fluctuations and color indicators of the observed objects were analyzed. The results of the research work are of interest to astrophysics and cosmology, and extragalactic astronomy; they are published [1-7], and are implemented in the educational process of the Physics faculty of Taras Shevchenko National University of Kyiv.  Product Description popup.authors Babur Valentyna М. Beshley Vasyl' V. Hnatyk Bohdan I. Hnatyk Roman B. Zhdanov Valery I. Petruk Oleh L. popup.nrat_date 2024-01-14 Close