3 papers
gr-qc2026
Photon rings and shadows of Kerr black holes immersed in a swirling universe
Rogério Capobianco, Betti Hartmann, Jutta Kunz +2
We discuss photon rings around as well as shadows of Kerr black holes immersed in a swirling spacetime (KBHSU). We find that the spin-spin interaction between the angular momentum…
gr-qc2025
Accretion Structures around Kerr Black Holes in a Swirling Background
Kristian Gjorgjieski, Rogério Capobianco
We investigate thick accretion structures around Kerr black holes in a swirling background. This stationary and axisymmetric spacetime is composed of a rotating black hole, which i…
gr-qc2024
Motion of charged particles in an electromagnetic swirling universe: The complete set of solutions
Rogério Capobianco, Betti Hartmann, Jutta Kunz
We discuss the motion of electrically and magnetically charged particles in the electromagnetic swirling universe. We show that the equations of motion can be decoupled in the Hami…