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Dynamical Photon Spheres in Charged Black Holes and Naked Singularities
Yaghoub Heydarzade, Vitalii Vertogradov
To understand the nature of a black hole shadow in dynamical spacetimes, we construct an analytical model of a dynamical photon sphere in the context of the Bonnor-Vaidya spacetime…
Dynamical Wormhole Solutions in Rastall Theory
Yaghoub Heydarzade, Maryam Ranjbar
Wormhole configurations in Einstein's general theory of relativity (GR) require exotic matter sources violating the weak energy condition (WEC). Rastall's theory is a generalizatio…
Hairy Kiselev Black Hole Solutions
Yaghoub Heydarzade, Maxim Misyura, Vitalii Vertogradov
In the realm of astrophysics, black holes exist within nonvacuum cosmological backgrounds, making it crucial to investigate how these backgrounds influence the properties of black…