RAGtime 20-22 (2018-2020) : M. Abramowicz: Zdeněk Stuchlík in the pursuit of beauty ...i // M. Boboqambarova, B. Turimov, B. Ahmedov: Charged particle motion around Reissner-Nordstrom black hole ...1 // M. Čemeljic, F. Yuan, H. Yan: Flux ropes in SANE disks ...11 // A. Demyanova, N. Kurbonov, O. Rakhimov, Y. Turaev, J. Rayimbaev: Characteristic orbits of charged particles around charged black holes ...19 // S. Hensh, A. Tursunov, M. Urbanec, Z. Stuchlík: Electrostatic effects on the hydrostatic equilibrium of compact stars ...29 // I. Hubač, F. Blaschke, O. N. Karpíšek, M. Švec, S. Wilson: Quantum information in biomolecules: transcription and replication of DNA using a soliton model ...55 // Y. Istomin, A. Gunya: Proton acceleration in the active galactic nuclei ...73 // A. Janiuk, D. Krol: Accretion induced black hole spin up in magnetized collapsars ...83 // B. Juraev, A. Tursunov: Particle ionization near a weakly charged black hole ...97 // V. Karas, K. Sapountzis, A. Janiuk: Magnetically ejected disks: Equatorial outflows near vertically magnetized black hole ...107 // F. Kayanikhoo, C. Providencia: The effect of magnetic field on the structure of strange quark star ...121 // M. Kerachian, G. Acquaviva, G. Lukes-Gerakopoulos: Dynamical analysis approaches in spatially curved FRW spacetimes ...133 // M. Kolos, D. Bardiev, B. Juraev: Charged particle motion around Schwarzschild black hole with split monopole magnetosphere ...145 // M. Kološ, A. Janiuk: Simulations of black hole accretion torus in various magnetic field configurations ...153 // 0. Kopáček, T. Tahamtan, V. Karas : Emergence of magnetic null points in electro-vacuum magnetosphere of compact objects: The case of a plunging neutron star ...165 // G. Lukes-Gerakopoulos, G. Acquaviva, C. Markakis: Probing dark energy through perfect fluid thermodynamics ...175 //
M. Matuszková, K. Klimovičová, G. Urbancová, D. Lančová, E. Šrámková, G. Török: Oscillations of non-slender tori in the Hartle-Thome geometry ...185 // R. Mishra, M. Cemeljic , Wlodek Klužniak: Backflow in simulated MHD accretion disks ...203 // B. Narzilloev, J. Rayimbaev // Can conformal gravity mimic the rotation of Kerr black hol in terms of particle dynamics? ...209 // R. Pánis, M. Kolos, Z. Stuchlík: Detection of chaotic behavior in time scries ...221 // D. Pugliese, H. Quevedo: On the metric bundles of axially symmetric spacetimes ...233 // D. Pugliese, z. Stuchlík: Effects of polytropic equations of state and toroidal magnetic fields on the accreting tori sequences in ringed accretion disks ...245 // Y. Pulnova, A. T. Araudo: On maximum energy cutoff in the hotspot of radiogalaxies 3C 105 and 3C 445 ...257 // ?. Rayimbaev, N. Juraeva: Dynamics of magnetized particles around Reissner-Nordstrom black holes ...263 // S. Shaymatov, B. Ahmedov, A. Bokhari, Y. Vyblyi: Exact solutions of Einstein field equations ...277 // M. Štolc, M. Zajaček, V. Karas: From gappy to ringed: signatures of an accretion disk radial structure in profiles of the reflection line ...287 // P- Suková, M. Zajaček, V. Witzany, V. Karas: Perturbing the accretion flow onto a supermassive black hole by a passing star ..299 // T- Tahamtan // Einstein-scalar field-square root nonlinear electrodynamics solution ...317 // B. Toshmatov, S. Tojiev, J. Xomidjonov: Construction of Taub-NUT black hole solutions in general relativity coupled to nonlinear electrodynamics ...327 // B. Turimov, B. Toshmatov, Z. Stuchlik: On magnetized orbits around Schwarzschild black hole ...337 // M. Urbanec, M. Fuzik: Neutron stars with quark cores ...343 // R. S. S. Vieira, W. Kluzniak: Levitating atmospheres around naked singularities ...351 //
M. Zajaček, A. Araudo, V. Karas, B. Czerny, A. Eckart, P. Suková, M. Stole: Missing bright red giants in the Galactic center: A fingerprint of its once active state? ...357 // O. Zelenka, G. Lukes-Gerakopoulos, V. Witzany: Recurrence analysis of spinning particles in the Schwarzschild background ...375 // W. Zhang, M. Dovčiak, M. Bursa, J. Svoboda, V. Karas: Understanding the iron Ka line emissivity profile with GR radiative transfer code ...383