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Constraints on Barrow entropy from M87* and S2 star observations
Kimet Jusufi, Mustapha Azreg-Aïnou, Mubasher Jamil +1
We use data from M87* central black hole shadow, as well as from the S2 star observations, in order to extract constraints on Barrow entropy. The latter is a modified entropy arisi…
Accretion of matter onto black holes in massive gravity with Lorentz symmetry breaking
Abdul Jawad, Kimet Jusufi, M. Umair Shahzad
In this paper we study the accretion of matter onto the black holes and the shadow images obtained by an infalling accretion flow of gas in a theory of massive gravity (MG) with a…
Axion-plasmon or magnetized plasma effect on an observable shadow and gravitational lensing of a Schwarzschild black hole
Farruh Atamurotov, Kimet Jusufi, Mubasher Jamil +2
In this paper, we study the influence of the axion-plasmon, as proposed in (Phys. Rev. Lett. 120, 181803 (2018)) on the optical properties of the Schwarzschild black hole. Our aim…
Thin accretion disk in the Simpson-Visser black-bounce and wormhole spacetimes
Parth Bambhaniya, Saurabh K, Kimet Jusufi +1
We compare the optical appearance of a thin accretion disk in the Simpson-Visser spacetime to the Schwarzschild black hole case in this paper. We calculate and illustrate the red-s…
Constraining Wormhole Geometries using the Orbit of S2 Star and the Event Horizon Telescope
Kimet Jusufi, Saurabh Kumar, Mustapha Azreg-Aïnou +3
In this paper we study the possibility of having a wormhole (WH) as a candidate for the Sgr A central object and test this idea by constraining their geometry using the mot…
Shadow and deflection angle of charged rotating black hole surrounded by perfect fluid dark matter
Farruh Atamurotov, Uma Papnoi, Kimet Jusufi
We analysed the shadow cast by charged rotating black hole (BH) in presence of perfect fluid dark matter (PFDM). We studied the null geodesic equations and obtained the shadow of t…
Modelling the Sgr A* Black Hole Immersed in a Dark Matter Spike
Sourabh Nampalliwar, Saurabh K., Kimet Jusufi +3
In this paper, we investigate the effects of a dark matter (DM) spike on the neighborhood of Sgr A*, the black hole (BH) in the center of the Milky Way galaxy. Our main goal is to…