Analyzing the influence of geometrical deformation on photon sphere and shadow radius: A new analytical approach—Spherically symmetric spacetimes

V Vertogradov, A Övgün - Physics of the Dark Universe, 2024 - Elsevier
In this paper, we introduce a new approach to study the behavior of the photon sphere and
shadow radius. Our method uses extended gravitational decoupling and reveals two …

Role of complexity on the minimal deformation of black holes

Z Yousaf, K Bamba, B Almutairi, S Khan… - … and Quantum Gravity, 2024 - iopscience.iop.org
We investigate spherically symmetric classes of anisotropic solutions within the realm of a
schematic gravitational decoupling scheme, primarily decoupling through minimal geometric …

Hairy Kiselev black hole solutions

Y Heydarzade, M Misyura, V Vertogradov - Physical Review D, 2023 - APS
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 …

Non-singular black hole by gravitational decoupling and some thermodynamic properties

M Misyura, A Rincon, V Vertogradov - Physics of the Dark Universe, 2024 - Elsevier
Gravitational decoupling allows us to obtain new solutions of general relativity. In this paper,
we obtain new solutions of the Einstein field equations which describe non-singular black …

Anisotropic extension of the Kohler–Chao–Tikekar cosmological solution with like Wyman IIa complexity factor

B Siza, J Andrade, D Santana, T Naseer - The European Physical Journal …, 2024 - Springer
We construct a new stellar compact object model in the regime of anisotropic pressure using
the framework of gravitational decoupling via minimal geometric deformation, with the …

Anisotropic extension of Kohler–Chao–Tikekar solution by minimal geometric deformation

J Andrade, KY Ortega, WNR Klínger, RCG Copa… - The European Physical …, 2023 - Springer
This work is devoted to transforming the known cosmological solution of Kohler–Chao–
Tikekar into an anisotropic interior solution using the framework of Gravitational Decoupling …

The generalized Vaidya spacetime with polytropic equation of state

V Vertogradov - General Relativity and Gravitation, 2024 - Springer
The process of the gravitational collapse might lead not only to a black hole but also to
naked singularity formation. In this paper, we consider the generalized Vaidya spacetime …

Generalized Vaidya spacetime: horizons, conformal symmetries, surface gravity and diagonalization

V Vertogradov, D Kudryavcev - Modern Physics Letters A, 2023 - World Scientific
In this paper, the different properties of generalized Vaidya spacetime are considered. We
define the location of horizons. We show that the apparent horizon can contain the event …

Collapsing scenarios of K-essence generalized Vaidya spacetime under f (R̄, T̄) gravity

A Panda, G Manna, S Ray, M Khlopov… - Chinese Journal of …, 2024 - Elsevier
The paper investigates the collapse of the generalized emergent Vaidya spacetime in the
setting of f (R ̄, T ̄) gravity, specifically in K-essence theory. In this study, the Dirac–Born …

Gravitational wave pulse and memory effects for hairy Kiselev black hole and its analogy with Bondi–Sachs formalism

H Hadi, AR Akbarieh, DF Mota - Classical and Quantum Gravity, 2024 - iopscience.iop.org
The investigation of non-vacuum cosmological backgrounds containing black holes is
greatly enhanced by the Kiselev solution. This solution plays a crucial role in understanding …