387 citations
- Universidade de São PauloBR28 papers
- Institute of Problems of Mechanical EngineeringRU24 papers
- National Research Tomsk State UniversityRU24 papers
- P.N. Lebedev Physical Institute of the Russian Academy of SciencesRU21 papers
- Russian Academy of SciencesRU19 papers
- Pulkovo ObservatoryRU16 papers
- Kazan Federal UniversityRU13 papers
- Institute of AstronomyRU11 papers
- N.N. Krasovskii Institute of Mathematics and Mechanics of the Ural Branch of the Russian Academy of SciencesRU10 papers
- Centre National de la Recherche ScientifiqueFR8 papers
- Uppsala UniversitySE8 papers
- Eastern Mediterranean UniversityCY7 papers
114 papers
Regular Black Hole Models in the Transition from Baryonic Matter to Quark Matter
Vitalii Vertogradov, Ali Övgün
In this paper, we investigate gravitational collapse scenarios involving baryonic matter transitioning into quark-gluon plasma under extreme astrophysical conditions, focusing on t…
Formation of regular black hole from baryonic matter
Vitalii Vertogradov, Ali Övgün, Daniil Shatov
We present a family of exact, singularity-free solutions describing the collapse of baryonic matter characterized by a barotropic equation of state whose coefficient varie…
Analytical approach for calculating shadow of dynamical black hole
Vitalii Vertogradov, Ali Övgün
We develop a compact and transparent framework for photon dynamics and shadow formation in slowly evolving, spherically symmetric spacetimes. Starting from the Eddington-Finkelstei…
Signatures of a de Sitter-core black hole in ringing, transmission and optical appearance
N. Heidari, A. A. Araújo Filho, V. Vertogradov and +1
We investigate a static, asymptotically flat black hole whose central region approaches a de Sitter vacuum. The geometry is controlled by the ADM mass and a core scale , a…
Exact Regular Black Hole Solutions with de Sitter Cores and Hagedorn Fluid
Vitalii Vertogradov, Ali Övgün
In this paper, we present three exact solutions to the Einstein field equations, each illustrating different black hole models. The first solution introduces a black hole with a va…
Analyzing the Influence of Geometrical Deformation on Photon Sphere and Shadow Radius: A New Analytical Approach -- Spherically Symmetric Spacetimes
Vitalii Vertogradov, Ali Övgün
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 important…