11 papers
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…
Thin accretion disk and gravitational capture cross sections of a quantum Oppenheimer--Snyder black hole immersed in an external magnetic field
Anuar Idrissov, Hernando Quevedo
We study a geometrically thin, optically thick Novikov--Thorne accretion disk and the gravitational capture cross sections of a quantum Oppenheimer--Snyder black hole immersed in a…
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…