27 citations · 158 across the 22 of their papers we have counts for
8 papers · 1 filter
Regular Reissner--Nordström--de Sitter Black Holes: Thin-Shell Matching and Modified Density Profiles
Reza Saadati, Yu Shi, Vitalii Vertogradov
We investigate two distinct approaches to regularizing the central singularity of the Reissner--Nordström--de Sitter geometry. In the first approach, a de Sitter interior is matche…
Effective Matter Conversion in Gravitational Collapse and the Dynamical Formation of Regular Black Holes
Emmanuele Battista, Ali Ovgun, Vitalii Vertogradov
We study inverse source reconstruction in generalized Vaidya spacetimes. A prescribed density fixes the mass and tangential pressure, while a two-sector decomposition determines a…
Black hole and wormhole branches in gravitational decoupling
Francisco Tello-Ortiz, Y. Gomez-Leyton, Vitalii Vertogradov +1
Minimal Geometric Deformation (MGD) applied to a static Schwarzschild black hole seed generates a single decoupler function , obtained by solving the -sector field equatio…
Optical-area minimum method for static spherical black hole shadows
Vitalii Vertogradov, Nikko John Leo S. Lobos, Ali Ovgun +1
We formulate a global optical-area method for shadows of static, spherically symmetric black holes. For the metric \(ds^{2}=-A(r)dt^{2}+B(r)dr^{2}+C(r)dΩ^{2}\), spherical sections…
Shadow of the generalized Vaidya black hole
Vitalii Vertogradov, Ali Övgün
In this paper, we investigate the shadow of the generalized Vaidya black hole described by the Husain solution. Assuming a barotropic equation of state for the additional matter se…
Regular Black Hole Formation and Gamma-Ray Burst from Matter Conversion
Vitalii Vertogradov, Zhanna Kuznetsova, Yu Shi
During the gravitational collapse of a massive star into a regular black hole, a new form of matter must be produced in order to prevent the formation of a central singularity. Sin…
Can finite-density QCD matter support a regular black hole core?
G. Lambiase, A. Övgün, V. Vertogradov
We investigate whether finite-density QCD matter can provide the stress-energy needed to regularize the center of a spherically symmetric black hole collapse. In a generalized Vaid…
Exact Dynamical Regular Black Holes from Generalized Polytropic Matter
Dmitriy Kudryavcev, Yi Ling, Vitalii Vertogradov
We present a class of exact, dynamical, and fully analytic solutions describing regular black holes formed via the gravitational collapse of matter obeying a generalized polytropic…