204 citations · 227 across the 13 of their papers we have counts for
17 papers
Geometrothermodynamics of Black Hole Shadows: A Review
Hernando Quevedo, Jose M. Ladino, Carlos E. Romero-Figueroa +1
Black-hole shadows and geometrothermodynamics (GTD) are defined in different spaces but depend on the same macroscopic black-hole parameters. We review their correspondence for Rei…
Naked Singularities and Black Hole Thermodynamics from Shadows and Photon Rings in the Quantum Oppenheimer-Snyder Model
Jose Miguel Ladino, Anuar Idrissov, Carlos E. Romero-Figueroa +1
We investigate the optical and thermodynamic properties of quantum Oppenheimer-Snyder (qOS) spacetimes in both the black hole and naked singularity regimes. By analyzing test-parti…
Static Spherically Symmetric Solutions in Nonconservative Unimodular Gravity
Anuar Idrissov, Hernando Quevedo
We study static and spherically symmetric black holes in nonconservative unimodular gravity, where the traceless field equations determine the source of a given geometry only up to…
Thin accretion-disc transfer functions in the q-metric spacetime: quadrupolar lensing signatures
Saken Toktarbay, Manas Khassanov, Aray Muratkhan +3
We study geometrically thin equatorial disc images in the static, axisymmetric q-metric spacetime using backward ray tracing. The Schwarzschild solution is recovered at ; for…
Observational properties of magnetized quantum Oppenheimer-Snyder black holes
Anuar Idrissov, Hernando Quevedo
We consider a thin accretion disk around the quantum Oppenheimer-Snyder black hole immersed in an asymptotically uniform magnetic field, together with the gravitational capture of…
Tidal forces in the quantum Oppenheimer--Snyder black hole
Anuar Idrissov, Hernando Quevedo
We investigate the tidal forces experienced by massive particles in radial free fall in the quantum Oppenheimer--Snyder black hole, a loop quantum gravity correction to the Schwarz…
Newtonian Shirokov Effect: Epicyclic Frequency Splitting from Mass Multipoles
Anuar Idrissov, Kuantay Boshkayev, Abylaikhan Tlemissov +1
We analyze small oscillations of nearly circular orbits in an axisymmetric Newtonian potential expanded in mass multipoles, as the classical counterpart of the relativistic Shiroko…
Quasi-homogeneous black hole geometrothermodynamics in Einstein-Maxwell theory
Hernando Quevedo
In this review, we establish the mathematical framework of geometrothermodynamics (GTD) as a formalism capable of describing non-extensive, quasi-homogeneous, self-gravitating syst…
Probing Black Hole Thermodynamics and Microstructure via the Shadow of Sagittarius A*
Jose Miguel Ladino, Carlos E. Romero-Figueroa, Hernando Quevedo
We explore the connection between black hole shadows, thermodynamic phase structure, and microstructure of charged and rotating black holes within General Relativity and Geometroth…
Thermodynamic acceptability of spherically symmetric perfect-fluid solutions in general relativity
Dina Demissenova, Nurzada Beissen, Kuantay Boshkayev +1
Static spherically symmetric perfect-fluid solutions of Einstein's equations play a central role in relativistic astrophysics and stellar structure theory. While many exact solutio…
Shirokov and Shapiro Effects in the Hartle-Thorne Spacetime
Anuar Idrissov, Kuantay Boshkayev, Serzhan Momynov +4
We investigate the influence of rotation and quadrupole deformations of astrophysical compact objects on the Shirokov and Shapiro effects within the Hartle-Thorne spacetime, which…
Rotation-Induced Effective Anisotropy in White Dwarfs as a Newtonian Benchmark with Relativistic Scale Assessment
Aray Muratkhan, Aliya Taukenova, Saken Toktarbay +1
We develop a one-dimensional Newtonian reduction for uniformly rotating cold white dwarfs in which the angle-averaged centrifugal support is represented by an effective anisotropic…
Shadow and Thermodynamics of deformed Schwarzschild-AdS black hole with a Cloud of Strings embedded in Perfect Fluid Dark Matter
Faizuddin Ahmed, Carlos E. Romero-Figueroa, Hernando Quevedo
We investigate the optical and thermodynamic properties of a deformed Schwarzschild Anti-de Sitter (AdS) black hole coupled to a cloud of strings and embedded in perfect fluid dark…
Horizon replicas in black hole shadows
D. Pugliese, H. Quevedo
Recently, new exploratory channels have opened up for the physics of highly compact objects, such as gravitational waves and black hole shadows. Moreover, more precise analysis and…
Observers in Kerr spacetimes: the ergoregion on the equatorial plane
D. Pugliese, H. Quevedo
We perform a detailed analysis of the properties of stationary observers located on the equatorial plane of the ergosphere in a Kerr spacetime, including light-surfaces. This study…
The ergoregion in the Kerr spacetime: properties of the equatorial circular motion
D. Pugliese, H. Quevedo
We investigate in detail the circular motion of test particles on the equatorial plane of the ergoregion in the Kerr spacetime. We consider all the regions where circular motion is…
Motion of charged test particles in Reissner--Nordström spacetime
D. Pugliese, H. Quevedo, R. Ruffini
We investigate the circular motion of charged test particles in the gravitational field of a charged mass described by the Reissner-Nordström (RN) spacetime. We study in detail all…