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Parameter Constraints on Traversable Wormholes within Beyond Horndeski Theories through Quasi-Periodic Oscillations
Farukh Abdulkhamidov, Petya Nedkova, Javlon Rayibaev +2
{\it Hunting} compact astrophysical objects such as black holes and wormholes, as well as testing gravity theories, are important issues in relativistic astrophysics. In this sense…
Comparison of Magnetized Thick Disks around Black Holes and Boson Stars
Kristian Gjorgjieski, Jutta Kunz, Petya Nedkova
Boson stars are considered as promising candidates for black hole mimickers. Similar to other compact objects they can form accretion disks around them. The properties of these dis…
Shadows of rotating hairy Kerr black holes coupled to time periodic scalar fields with non-flat target space
Galin N. Gyulchev, Ayush Roy, Lucas G. Collodel +3
We study the shadows cast by rotating hairy black holes with two non-trivial time-periodic scalar fields having a non-flat Gaussian curvature of the target space spanned by the sca…
Observing naked singularities by the present and next-generation Event Horizon Telescope
Valentin Deliyski, Galin Gyulchev, Petya Nedkova +1
We consider the observational signatures of reflective naked singularities as seen by the current and next-generation Event Horizon Telescope (EHT). The reflective naked singularit…